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           Third National Health and Nutrition Examination Survey               
                            (NHANES III), 1988-94                               
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                            Catalog Number 76300                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
               NHANES III LABORATORY DATA FILE DOCUMENTATION                    
                                                                                
                                                                                
                                                                                
                          Ages one year and older                               
                                                                                
                                                                                
                                                                                
                                                                                
                                December 1996                                   
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                                
                                                                               
                              Table of Contents                                 
                                                                                
                                                                                
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
Guidelines for Data Users. . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
Survey Description . . . . . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
Sample Design and Analysis Guidelines. . . . . . . . . . . . . . . . . .        
                                                                                
Data Preparation and Processing Procedures . . . . . . . . . . . . . . .        
                                                                                
General References . . . . . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
NHANES III Laboratory Data                                                      
                                                                                
     General Information . . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
     Data File Index . . . . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
     Data File Item Descriptions, Codes, Counts, and Notes . . . . . . .        
                                                                                
     References  . . . . . . . . . . . . . . . . . . . . . . . . . . . .        
                                                                                
                                                                               
                                Introduction                                    
                                                                                
The National Center for Health Statistics (NCHS) of the Centers for Disease     
Control and Prevention (CDC) collects, analyzes, and disseminates data on       
the health status of U.S. residents.  The results of surveys, analyses, and     
studies are made known through a number of data release mechanisms              
including publications, mainframe computer data files, CD-ROMs (Search and      
Retrieval Software, Statistical Export and Tabulation System (SETS)), and the   
Internet (http://www.cdc.gov/nchswww/nchshome.htm).                             
                                                                                
The National Health and Nutrition Examination Survey (NHANES) is a periodic     
survey conducted by NCHS.  The third National Health and Nutrition              
Examination Survey (NHANES III), conducted from 1988 through 1994, was the      
seventh in a series of these surveys based on a complex, multi-stage sample     
plan.  It was designed to provide national estimates of the health and          
nutritional status of the United States' civilian, noninstitutionalized         
population aged two months and older.                                           
                                                                                
Data from NHANES III are being released in five public release data files:      
                                                                                
     NHANES III Household Adult Data File (Catalog Number 77560)                
                                                                                
     NHANES III Household Youth Data File (Catalog Number 77550)                
                                                                                
     NHANES III Examination Data File (Catalog Number 76200)                    
                                                                                
     NHANES III Laboratory Data File (Catalog Number 76300)                     
                                                                                
     NHANES III Dietary Recall Data Files (Catalog Number 76700)                
                                                                                
                                                                                
                                                                                
A table showing the location of the interview and examination components in     
the five NHANES III public release data files follows.                          
                                                                                
                                                                               
Location of the interview and examination components in the five NHANES III     
public release data files                                                       
                                                                                
                                                      Data File                 
                                                                                
                                                                                
               Topic                     | HA  | HY  | EXAM  | LAB | DIET |     
-----------------------------------------+-----+-----+-------+-----+------+     
Sample weights                           |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Age/race/sex                             |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Ethnic background                        |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Household composition                    |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Individual characteristics               |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Health insurance                         |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Family background                        |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Occupation of family head                |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Housing characteristics                  |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Family characteristics                   |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Orientation                              |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Health services                          |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Selected health conditions               |  X  |  X  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Diabetes questions                       |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
High blood pressure and                  |  X  |  .  |   .   |  .  |   .  |     
     cholesterol questions               |     |     |       |     |      |     
-----------------------------------------+-----+-----+-------+-----+------+     
Cardiovascular disease questions         |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Musculoskeletal conditions               |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Physical functioning questions           |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Gallbladder disease questions            |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
                                                                                
                                                                               
Location of the interview and examination components in the five NHANES III     
public release data files (continued)                                           
                                                                                
                                                                                
                                                     Data File                  
                                                                                
                                                                                
               Topic                     | HA  | HY  | EXAM  | LAB | DIET |     
-----------------------------------------+-----+-----+-------+-----+------+     
Kidney conditions                        |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Respiratory and allergy questions        |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Diet questions                           |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Food frequency                           |  X  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Vision questions                         |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Hearing questions                        |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Dental care and status                   |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Tobacco                                  |  X  |  .  |   X   |  .   |   . |     
-----------------------------------------+-----+-----+-------+-----+------+     
Occupation                               |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Language usage                           |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Exercise                                 |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Social support/residence                 |  X  |  .  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Vitamin/mineral/medicine usage           |  X  |  X  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Blood pressure measurement               |  X  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Birth                                    |  .  |  X  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Infant feeding practices/diet            |  .  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Motor and social development             |  .  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Functional impairment                    |  X  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
School attendance                        |  .  |  X  |   .   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Cognitive function                       |  .  |  X  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
                                                                                
                                                                               
Location of the interview and examination components in the five NHANES III     
public release data files (continued)                                           
                                                                                
                                                      Data File                 
                                                                                
                                                                                
               Topic                     | HA  | HY  | EXAM  | LAB | DIET |     
-----------------------------------------+-----+-----+-------+-----+------+     
Alcohol and drug use                     |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Reproductive health                      |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Diagnostic interview schedule            |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Activity                                 |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Physician's examination                  |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Height and weight                        |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Body measurements                        |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Dental examination                       |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Allergy skin test                        |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Audiometry                               |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Tympanometry                             |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
WISC and WRAT                            |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Spirometry                               |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Bone densitometry                        |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Gallbladder ultrasonography              |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Central nervous system                   |  .  |  .  |   X   |  .  |   .  |     
 function evaluation                     |     |     |       |     |      |     
-----------------------------------------+-----+-----+-------+-----+------+     
Fundus photography                       |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Physical function evaluation             |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Fasting questions                        |  .  |  .  |   .   |  X  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
                                                                                
                                                                               
Location of the interview and examination components in the five NHANES III     
public release data files (continued)                                           
                                                                                
                                                      Data File                 
                                                                                
                                                                                
               Topic                     | HA  | HY  | EXAM  | LAB | DIET |     
-----------------------------------------+-----+-----+-------+-----+------+     
Laboratory tests on blood and urine      |  .  |  .  |   .   |  X  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Total nutrient intakes                   |  .  |  .  |   X   |  .  |   .  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Individual foods                         |  .  |  .  |   .   |  .  |   X  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Combination foods                        |  .  |  .  |   .   |  .  |   X  |     
-----------------------------------------+-----+-----+-------+-----+------+     
Ingredients                              |  .  |  .  |   .   |  .  |   X  |     
-----------------------------------------+-----+-----+-------+-----+------+     
                                                                                
                                                                                
Data File Definitions                                                           
                                                                                
HA   -  Household Adult Data File                                               
HY   -  Household Youth Data File                                               
EXAM -  Examination Data File                                                   
LAB  -  Laboratory Data File                                                    
DIET -  Dietary Recall Data Files                                               
                                                                                
                                                                               
This document includes the documentation for the NHANES III Laboratory Data     
File and also contains a general overview of the survey and the use of the      
data files.  The general overview includes five sections.  The first            
section, entitled "Guidelines for Data Users," contains important information   
about the use of the data files.  The second section, "Survey Description,"     
is a brief overview of the survey plan and operation.  The third section,       
"Sample Design and Analysis Guidelines," describes some technical aspects of    
the sampling plan and discusses some analytic issues particularly related to    
the use of data from complex sample surveys.  The "Data Preparation and         
Processing Procedures" section describes the editing conventions and the        
codes used to represent the data.  The last and fifth section, "General         
References," includes a reference list for the survey overview sections of      
the document.                                                                   
                                                                                
Public Use Data Files for the third National Health and Nutrition               
Examination Survey will also be available from the National Technical           
Information Service (NTIS).  A list of NCHS public use data tapes available     
for purchase from NTIS may be obtained from the Data Dissemination Branch at    
NCHS.  Information regarding a bibliography (on disk) of journal articles       
citing data from all the NHANES and the availability of NHANES III data in      
CD-ROM/SETS software format can be obtained from the Data Dissemination         
Branch(301-436-8500) or by writing to:                                          
                                                                                
Data Dissemination Branch                                                       
National Center for Health Statistics                                           
Room 1018                                                                       
6525 Belcrest Road                                                              
Hyattsville, Maryland 20782                                                     
                                                                                
                                                                                
NTIS can be contacted at:                                                       
                                                                                
NTIS - Computer Products Office                                                 
5285 Port Royal Road                                                            
Springfield, Virginia 22161                                                     
(703) 487-4807                                                                  
                                                                                
Copies of all NHANES III questionnaires and data collection forms are           
included in the Plan and Operation of the Third National Health and             
Nutrition Examination Survey, 1988-94 (NCHS, 1994; U.S. DHHS, 1996).  This      
publication, along with detailed information on NHANES procedures,              
interviewing, data collection, quality control techniques, survey design,       
nonresponse, and sample weighting can be found on the NHANES III Reference      
Manuals and Reports CD-ROM (U.S. DHHS, 1996).  Information on how to order      
this CD-ROM is available from the Data Dissemination Branch at NCHS at the      
address and telephone number given above.                                       
                                                                                
                                                                               
                    GUIDELINES FOR DATA USERS                                   
                                                                                
                                                                                
Please refer to the following important information before analyzing data.      
                                                                                
                                                                                
NHANES III Background Documents                                                 
                                                                                
o    The Plan and Operation of the Third National Health and Nutrition          
     Examination Survey, 1988-94, (NCHS, 1994; U.S. DHHS, 1996) provides an     
     overview of the survey and includes copies of the survey forms.            
                                                                                
o    The sample design, nonresponse, and analytic guidelines documents on       
     the NHANES III Reference Manuals and Reports CD-ROM (U.S. DHHS, 1996)      
     discuss the reasons that sample weights and the complex survey design      
     should be taken into account when conducting any analysis.                 
                                                                                
o    Instruction manuals, laboratory procedures, and other NHANES III           
     reference manuals on the NHANES III Reference Manuals and Reports          
     CD-ROM(U.S. DHHS, 1996) are also available for further information on      
     the details of the survey.                                                 
                                                                                
                                                                                
Analytic Data Set Preparation                                                   
                                                                                
o    Most NHANES III survey design and demographic variables are found only     
     on the Adult and Youth Household Data Files.  In preparing a data set      
     for analysis, other data files must be merged with either or both of       
     these files to obtain many important analytic variables.                   
                                                                                
o    All of the NHANES III public use data files are linked with the common     
     survey participant identification number (SEQN).  Merging information      
     from multiple NHANES III data files using this variable ensures that       
     the appropriate information for each survey participant is linked          
     correctly.                                                                 
                                                                                
o    NHANES III public use data files do not have the same number of            
     records on each file.  The Household Questionnaire Files (divided into     
     two files, Adult and Youth) contain more records than the Examination      
     Data File because not everyone who was interviewed completed the           
     examination. The Laboratory Data File contains data only for persons       
     aged one year and older.  The Individual Foods Data File based on the      
     dietary recall has multiple records for each person rather than the one    
     record per sample person contained in the other data files.                
                                                                                
o    For each data file, SAS program code with standard variable names and      
     labels is provided as separate text files on the CD-ROM that contains      
     the data files.  This SAS program code can be used to create a SAS         
     data set from the data file.                                               
                                                                                
o    Modifications were made to items in the questionnaires, laboratory,        
     and examination components over the course of the survey; as a result,     
     data may not be available for certain variables for the full six years.    
     In addition, variables may differ by phase since some changes were         
     implemented between phases.  Users are encouraged to read the Notes        
     sections of this document carefully for information about changes.         
                                                                                
o    Extremely high and low values have been verified whenever possible,        
     and numerous consistency checks have been performed.  Nonetheless, users   
     should examine the range and frequency of values before analyzing          
     data.                                                                      
                                                                               
o    Some data were not ready for release at the time of this publication       
     due to continued processing of the data or analysis of laboratory          
     specimens.  A listing of those data are available in the general           
     information section of each data file.                                     
                                                                                
o    Confidential and administrative data are not being released to the         
     public.  Additionally, some variables have been recoded to help            
     protect the confidentiality of the survey participants.  For example,      
     all age-related variables were recoded to 90+ years for persons who were   
     90 years of age and older.                                                 
                                                                                
o    Some variable names may differ from those used in the Phase 1 NHANES       
     III Provisional Data Release and some variables included in the Phase 1    
     provisional release may not appear on these files.                         
                                                                                
o    Although the data files have been edited carefully, errors may be          
     detected.  Please notify NCHS staff (301-436-8500) of any errors in        
     the data file or the documentation.                                        
                                                                                
                                                                                
                                                                               
Analytic Considerations                                                         
                                                                                
o    NHANES III (1988-94) was designed so that the survey's first three         
     years, 1988-91, its last three years, 1991-94, and the entire six          
     years were national probability samples.  Analysts are encouraged to use   
     all six years of survey results.                                           
                                                                                
o    Sample weights are available for analyzing NHANES III data.  One of        
     the following three sample weights will be appropriate for nearly all      
     analyses:  interviewed sample final weight (WTPFQX6), examined sample      
     final weight (WTPFEX6), and mobile examination center (MEC)- and           
     home-examined sample final weight (WTPFHX6).  Choosing which of these      
     sample weights to use in any analysis depends on the variables being       
     used.  A good rule of thumb is to use "the least common denominator"       
     approach.  In this approach, the user checks the variables of              
     interest.  The variable that was collected on the smallest number of       
     persons is the "least common denominator," and the sample weight that      
     applies to that variable is the appropriate one to use for that            
     analysis.  For more detailed information, see the Analytic and Reporting   
     Guidelines for NHANES III (U.S. DHHS, 1996).                               
                                                                                
                                                                                
Referencing or Citing NHANES III Data                                           
                                                                                
o    In publications, please acknowledge NCHS as the original data source.      
     For instance, the reference for the NHANES III Laboratory Data File        
     is:                                                                        
                                                                                
     U.S. Department of Health and Human Services (DHHS).  National Center      
     for Health Statistics.  Third National Health and Nutrition                
     Examination Survey, 1988-1994, NHANES III Laboratory Data File (CD-ROM).   
     Public Use Data File Documentation Number 76200.  Hyattsville, MD.:        
     Centers for Disease Control and Prevention, 1996.  Available from          
     National Technical Information Service (NTIS), Springfield, VA.            
     Acrobat.  PDF format; includes access software:  Adobe Systems, Inc.       
     Acrobat Reader 2.1.                                                        
                                                                                
o    Please place the acronym "NHANES III" in the titles or abstracts of        
     journal articles and other publications in order to facilitate the         
     retrieval of such materials in bibliographic searches.                     
                                                                                
                                                                               
                         SURVEY DESCRIPTION                                     
                                                                                
                                                                                
The third National Health and Nutrition Examination Survey (NHANES III) was     
the seventh in a series of large health examination surveys conducted in        
the United States beginning in 1960.  Three of these surveys, the National      
Health Examination Surveys (NHES), were conducted in the 1960's (NCHS, 1965;    
NCHS, 1967; NCHS, 1969).  In 1970, an expanded nutrition component was added    
to provide data with which to assess nutritional status and dietary             
practices, and the name was changed to the National Health and Nutrition        
Examination Survey (Miller, 1973; Engel, 1978; McDowell, 1981).  A special      
survey of Hispanic populations in the United States was conducted during        
1982-1984 (NCHS, 1985).                                                         
                                                                                
The general structure of the NHANES III sample design was similar to that       
of the previous NHANES.  All of the surveys used complex, multi-stage,          
stratified, clustered samples of civilian, noninstitutionalized                 
populations.  NHANES III was the first NHANES without an upper age limit; in    
fact, the age range for the survey was two months and older.  A home            
examination option was employed for the first time in order to obtain           
examination data for very young children and for elderly persons who were       
unable to visit the mobile examination center (MEC).  The home examination      
included only a subset of the components used in the full MEC examination       
since it would have been difficult to collect some types of data in a home      
setting.  A detailed description of design specifications and copies of the     
data collection forms can be found in the Plan and Operation of the Third       
National Health and Nutrition Examination Survey, 1988-1994 (NCHS, 1994; U.S.   
DHHS, 1996).                                                                    
                                                                                
NHANES III was conducted from October 1988 through October 1994 in two          
phases, each of which comprised a national probability sample.  The first       
phase was conducted from October 18, 1988, through October 24, 1991, at 44      
locations.  The second phase was conducted from September 20, 1991, through     
October 15, 1994, at 45 different locations.  In NHANES III, 39,695 persons     
were selected over the six years; of those, 33,994 (86%) were interviewed       
in their homes.  All interviewed persons were invited to the MEC for a          
medical examination.  Seventy-eight percent (30,818) of the selected persons    
were examined in the MEC, and an additional 493 persons were given a special,   
limited examination in their homes.                                             
                                                                                
Data collection began with a household interview.  Several questionnaires       
were administered in the household:  Household Screener Questionnaire,          
Family Questionnaire, Household Adult Questionnaire, and Household Youth        
Questionnaire.                                                                  
                                                                                
At the MEC, an examination was performed, and five automated questionnaires     
or interviews were administered:  MEC Adult Questionnaire, MEC Youth            
Questionnaire, MEC Proxy Questionnaire, 24-Hour Dietary Recall, and Dietary     
Food Frequency (ages 12-16 years).  The health examination component            
included a variety of tests and procedures.  The examinee's age at the time     
of the interview and other factors determined which procedures were             
administered.  Blood and urine specimens were obtained, and a number of tests   
and measurements were performed including body measurements, spirometry,        
fundus photography, x-rays, electrocardiography, allergy and glucose            
tolerance tests, and ultrasonography.  Measurements were taken of bone          
density, hearing, and physical, cognitive, and central nervous system           
functions.  A physician performed a limited standardized medical examination    
and a dentist performed a standardized dental examination.  While some of the   
blood and urine analyses were performed in the MEC laboratory, most analyses    
were conducted elsewhere by contract laboratories.                              
                                                                                
                                                                               
A home examination was conducted for those sample persons aged 2-11 months      
and aged 20 years or older who were unable to visit the mobile examination      
center.  The home examination consisted of an abbreviated version of the        
tests and interviews performed in the MEC.  Depending on age of the sample      
person, the components included body measurements, blood pressure,              
spirometry, venipuncture, physical function evaluation, and a questionnaire     
to inquire about infant feeding, selected health conditions, cognitive          
function, tobacco use, and reproductive history.                                
                                                                                
                                                                               
               SAMPLE DESIGN AND ANALYSIS GUIDELINES                            
                                                                                
                                                                                
Sample Design                                                                   
                                                                                
The general structure of the NHANES III sample design is the same as that       
of the previous NHANES.  Each of these surveys used a stratified, multi-stage   
probability design.  The major design parameters of the two previous NHANES     
and the special Hispanic HANES, as well as NHANES III, have been previously     
summarized (Miller, 1973; McDowell, 1981; NCHS, 1985; NCHS, 1994).  The         
NHANES III sample was designed to be self-weighting within a primary            
sampling unit (PSU) for subdomains (age, sex, and race-ethnic groups).  While   
the sample was fairly close to self-weighting nationally for each of these      
subdomain groups, it was not representative of the total population, which      
includes institutionalized, non-civilian persons that were outside the          
scope of the survey.                                                            
                                                                                
The NHANES III sample represented the total civilian, noninstitutionalized      
population, two months of age or over, in the 50 states and the District of     
Columbia of the United States.  The first stage of the design consisted of      
selecting a sample of 81 PSU's that were mostly individual counties.  In a      
few cases, adjacent counties were combined to keep PSU's above a minimum        
population size.  The PSU's were stratified and selected with probability       
proportional to size (PPS).  Thirteen large counties (strata) were chosen       
with certainty (probability of one).  For operational reasons, these 13         
certainty PSU's were divided into 21 survey locations.  After the 13            
certainty strata were designated, the remaining PSU's in the United States      
were grouped into 34 strata, and two PSU's were selected per stratum (68        
survey locations).  The selection was done with PPS and without                 
replacement.  The NHANES III sample therefore consists of 81 PSU's or 89        
locations.                                                                      
                                                                                
The 89 locations were randomly divided into two groups, one for each phase.     
The first group consisted of 44 and the other of 45 locations.  One set         
of PSU's was allocated to the first three-year survey period (1988-91) and      
the other set to the second three-year period (1991-94).  Therefore,            
unbiased estimates (from the point of view of sample selection) of health and   
nutrition characteristics can be independently produced for both Phase 1        
and Phase 2 as well as for both phases combined.                                
                                                                                
For most of the sample, the second stage of the design consisted of area        
segments composed of city or suburban blocks, combinations of blocks, or        
other area segments in places where block statistics were not produced in       
the 1980 Census.  In the first phase of NHANES III, the area segments were      
used only for a sample of persons who lived in housing units built before       
1980.  For units built in 1980 and later, the second stage consisted of sets    
of addresses selected from building permits issued in 1980 or later.  These     
are referred to as "new construction segments."  In the second phase, 1990      
Census data and maps were used to define the area segments.  Because the        
second phase followed within a few years of the 1990 Census, new construction   
did not account for a significant part of the sample, and the entire sample     
came from the area segments.                                                    
                                                                                
                                                                               
The third stage of sample selection consisted of households and certain         
types of group quarters, such as dormitories.  All households and eligible      
group quarters in the sample segments were listed, and a subsample was          
designated for screening to identify potential sample persons.  The             
subsampling rates enabled production of a national, approximately               
equal-probability sample of households in most of the United States with        
higher rates for the geographic strata with high Mexican-American               
populations.  Within each geographic stratum, there was a nearly                
equal-probability sample of households across all 89 stands.                    
                                                                                
Persons within the sample of households or group quarters were the fourth       
stage of sample selection.  All eligible members within a household were        
listed, and a subsample of individuals was selected based on sex, age, and      
race or ethnicity.  The definitions of the sex, age, race or ethnic             
classes, subsampling rates, and designation of potential sample persons         
within screened households were developed to provide approximately              
self-weighting samples for each subdomain within geographic strata and at the   
same time to maximize the average number of sample persons per sample           
household.  Previous NHANES indicated that this increased the overall           
participation rate.  Although the exact sample sizes were not known until       
data collection was completed, estimates were made.  Below is a summary of      
the sample sizes for the full six-year NHANES III at each stage of selection:   
                                                                                
Number of PSU's                                  81                             
Number of stands (survey locations)              89                             
Number of segments                               2,144                          
Number of households screened                    93,653                         
Number of households with sample persons         19,528                         
Number of designated sample persons              39,695                         
Number of interviewed sample persons             33,994                         
Number of MEC-examined sample persons            30,818                         
Number of home-examined sample persons           493                            
                                                                                
More detailed information on the sample design and weighting and estimation     
procedures for NHANES III can be found in the Plan and Operation of the         
Third National Health and Nutrition Examination Survey, 1988-94 (NCHS, 1994;    
U.S. DHHS, 1996) and in the Analytic and Reporting Guidelines: Third National   
Health and Nutrition Examination Survey (NHANES III), 1988-94 (U.S. DHHS,       
1996).                                                                          
                                                                                
Analysis Guidelines                                                             
                                                                                
Because of the complex survey design used in NHANES III, traditional            
methods of statistical analysis based on the assumption of a simple random      
sample are not applicable.  Detailed descriptions of this issue and possible    
analytic methods for analyzing NHANES data have been described earlier (NCHS,   
1985; Yetley, 1987; Landis, 1982; Delgado, 1990).  Recent analytic and          
reporting guidelines that should be used for most NHANES III analyses and       
publications are contained in Analytic and Reporting Guidelines (U.S. DHHS,     
1996).  These recommendations differ slightly from those used by analysts for   
previous NHANES surveys.  These suggested guidelines provide a framework to     
users for producing estimates that conform to the analytic design of the        
survey.  All users are strongly urged to review these analytic and reporting    
guidelines before beginning any analyses of NHANES III data.                    
                                                                                
                                                                               
It is important to remember that this set of statistical guidelines is not      
absolute.  When conducting analyses, the analyst needs to use his/her           
subject matter knowledge (including methodological issues) as well as           
information about the survey design.  The more one deviates from the original   
analytic categories defined in the sample design, the more important it is to   
evaluate the results carefully and to interpret the findings cautiously.        
                                                                                
In NHANES III, 89 survey locations were randomly divided into two sets or       
phases, the first consisting of 44 and the other of 45 locations.  One set      
of PSU's was allocated to the first three-year survey period (1988-91) and      
the other set to the second three-year period (1991-94).  Therefore, unbiased   
national estimates of health and nutrition characteristics can be               
independently produced for each phase as well as for both phases combined.      
Computation of national estimates from both phases combined (i.e., total        
NHANES III) is the preferred option; individual phase estimates may be          
highly variable.  In addition, individual phase estimates are not               
statistically independent.  It is also difficult to evaluate whether            
differences in individual phase estimates are real or due to methodological     
differences.  That is, differences may be due to changes in sampling methods    
or data collection methodology over time.  At this time, there is no valid      
statistical test for examining differences between Phase 1 and Phase 2.         
Therefore, although point estimates can be produced separately for each         
phase, no test is available to test whether those estimates are                 
significantly different from each other.                                        
                                                                                
NHANES III is based on a complex, multi-stage probability sample design.        
Several aspects of the NHANES design must be taken into account in data         
analysis, including the sample weights and the complex survey design.           
Appropriate sample weights are needed to estimate prevalence, means,            
medians, and other statistics.  Sample weights are used to produce correct      
population estimates because each sample person does not have the same          
probability of selection.  The sample weights incorporate the differential      
probabilities of selection and include adjustments for noncoverage and          
nonresponse.  A detailed discussion of nonresponse adjustments and issues       
related to survey coverage have been published (U.S. DHHS, 1996).  With the     
large oversampling of young children, older persons, black persons, and         
Mexican-Americans in NHANES III, it is essential that the sample weights be     
used in all analyses.  Otherwise, a misinterpretation of results is highly      
likely.  Other aspects of the design that must be taken into account in data    
analyses are the strata and PSU pairings from the sample design.  These         
pairings should be used to estimate variances and test for statistical          
significance.  For weighted analyses, analysts can use special computer         
software packages that use an appropriate method for estimating variances for   
complex samples such as SUDAAN (Shah, 1995) and WesVarPC (Westat, 1996).        
                                                                                
Although initial exploratory analyses may be performed on unweighted data       
using standard statistical packages and assuming simple random sampling,        
final analyses should be done on weighted data using appropriate sample         
weights.  A summary of the weighting methodology and the type of sample         
weights developed for NHANES III is included in Weighting and Estimation        
Methodology (U.S. DHHS, 1996).                                                  
                                                                                
The purpose of weighting the sample data is to permit analysts to produce       
estimates of statistics that would have been obtained if the entire             
sampling frame (the United States) had been surveyed.  Sample weights can be    
considered as measures of the number of persons the particular sample           
observation represents.  Weighting takes into account several features of       
the survey:  the specific probabilities of selection for the individual         
domains that were oversampled as well as nonresponse and differences between    
the sample and the total U.S. population.  Differences between the sample and   
                                                                                
                                                                               
the population may arise due to sampling variability, differential              
undercoverage in the survey among demographic groups, and possibly other        
types of response errors, such as differential response rates or                
misclassification errors.  Sample weighting in NHANES III was used to:          
                                                                                
1.   Compensate for differential probabilities of selection among subgroups     
     (i.e., age-sex-race-ethnicity subdomains where persons living in           
     different geographic strata were sampled at different rates);              
2.   Reduce biases arising from the fact that nonrespondents may be             
     different from those who participate;                                      
3.   Bring sample data up to the dimensions of the target population            
     totals;                                                                    
4.   Compensate, to the extent possible, for inadequacies in the sampling       
     frame (resulting from omissions of some housing units in the listing       
     of area segments, omissions of persons with no fixed address, etc.); and   
5.   To reduce variances in the estimation procedure by using auxiliary         
     information that is known with a high degree of accuracy.                  
                                                                                
In NHANES III, the sample weighting was carried out in three stages.  The       
first stage involved the computation of weights to compensate for unequal       
probabilities of selection (objective 1, above).  The second stage adjusted     
for nonresponse (objective 2).  The third stage used poststratification of      
the sample weights to Census Bureau estimates of the U.S. population to         
accomplish the third, fourth, and fifth objectives simultaneously.  In          
NHANES III, several types of sample weights (see the sample weights table       
that follows) were computed for the interviewed and examined sample and are     
included in the NHANES III data file.  Also, sample weights were computed       
separately for Phase 1 (1988-91), Phase 2 (1991-94), and total NHANES III       
(1988-94) to facilitate analysis of items collected only in Phase 1, only       
in Phase 2, and over six years of the survey.  Three sets of pseudo strata      
and PSU pairings are provided to use with SUDAAN in variance estimation.        
Since NHANES III is based on a complex, multi-stage sample design,              
appropriate sample weights should be used in analyses to produce national       
estimates of prevalence and associated variances while accounting for           
unequal probability of selection of sample persons.  For example, the final     
interview weight, WTPFQX6, should be used for analysis of the items or          
questions from the family or household questionnaires, and the final MEC        
examination weight, WTPFEX6, should be used for analysis of the                 
questionnaires and measurements administered in the MEC.  Furthermore, for a    
combined analysis of measurements from the MEC examinations and associated      
medical history questions from the household interview, the final MEC           
examination weight, WTPFEX6, should be used.  We recommend using SUDAAN         
(Shah, 1995) to estimate statistics of interest and the associated variance.    
However, one can also use other published methods for variance estimation.      
Application of SUDAAN and alternative methods, such as the average design       
effect approach, balance repeated replication (BRR) methods, or jackknife       
methods for variance estimation, are discussed in Weighting and Estimation      
Methodology (U.S. DHHS, 1996).                                                  
                                                                                
                                                                               
Appropriate Uses of the NHANES III Sample Weights                               
                                                                                
                                                                                
                                                                                
Final interview weight, WTPFQX6                                                 
                                                                                
          Use only in conjunction with the sample interviewed at home and       
          with items collected during the household interview.                  
                                                                                
                                                                                
Final examination (MEC only) weight, WTPFEX6                                    
                                                                                
          Use only in conjunction with the MEC-examined sample and with         
          interview and examination items collected at the MEC.                 
                                                                                
                                                                                
Final MEC+home examination weight, WTPFHX6                                      
                                                                                
          Use only in conjunction with the MEC+home-examined sample and         
          with items collected at both the MEC and home.                        
                                                                                
                                                                                
Final allergy weight, WTPFALG6                                                  
                                                                                
          Use only in conjunction with the allergy subsample and with items     
          collected as part of the allergy component of the exam.               
                                                                                
                                                                                
Final CNS weight, WTPFCNS6                                                      
                                                                                
          Use only in conjunction with the CNS subsample and with items         
          collected as part of the CNS component of the exam.                   
                                                                                
                                                                                
Final morning examination (MEC only) subsample weight, WTPFSD6                  
                                                                                
          Use only in conjunction with the MEC-examined persons assigned to     
          the morning subsample and only with items collected in the MEC        
          exam.                                                                 
                                                                                
                                                                                
Final afternoon/evening examination (MEC only) subsample weight, WTPFMD6        
                                                                                
          Use only in conjunction with the MEC-examined persons assigned to     
          the afternoon/evening subsample and only with items collected in      
          the MEC exam.                                                         
                                                                                
                                                                                
Final morning examination (MEC+home) subsample weight, WTPFHSD6                 
                                                                                
          Use only in conjunction with the MEC- and home-examined persons       
          assigned to the morning subsample and with items collected during     
          the MEC and home examinations.                                        
                                                                                
                                                                                
Final afternoon/evening examination (MEC+home) weight, WTPFHMD6                 
                                                                                
          Use only in conjunction with the MEC- and home-examined persons       
          assigned to the afternoon/evening subsample and with items            
          collected during the MEC and home examinations.                       
                                                                                
                                                                               
               DATA PREPARATION AND PROCESSING PROCEDURES                       
                                                                                
                                                                                
Automated data collection procedures for the survey were introduced in          
NHANES III.  In the mobile examination centers, data for the interview and      
examination components were recorded directly onto a computerized data          
collection form.  With the exception of a few independently automated           
systems, the system was centrally integrated.  This operation allowed for       
ongoing monitoring of much of the data.  Before the introduction of the         
computer-assisted personal interview (CAPI), the household questionnaire        
data were reviewed manually by field editors and interviewers.  CAPI            
(1992-1994 only) questionnaires featured built-in edits to prevent entering     
inconsistencies and out-of-range responses.  The multi-level data               
collection and quality control systems are discussed in detail in the Plan      
and Operation of the Third National Health and Nutrition Examination Survey,    
1988-1994 (NCHS, 1994; U.S. DHHS, 1996).  All interview, laboratory, and        
examination data were sent to NCHS for final processing.                        
                                                                                
Guidelines were developed that provided standards for naming variables,         
filling missing values and coding conventional responses, handling missing      
records, and standardizing two-part quantity/unit questionnaire variables.      
NCHS staff, assisted by contract staff, developed data editing                  
specifications that checked data sets for valid codes, ranges, and skip         
pattern consistencies and examined the consistency of values between            
interrelated variables.  Comments, collected in both interviews and             
examination components, were reviewed and recoded when possible.  Responses     
to "Other" and "Specify" were recoded either to existing code categories or     
to new categories.  The documentation for each data set includes notes for      
those variables that have been recoded and standardized and for those           
variables that differ significantly from what appears in the original data      
collection instrument.  While the data have undergone many quality control      
and editing procedures, there still may be values that appear extreme or        
illogical.  Values that varied considerably from what was expected were         
examined by analysts who checked for comments or other responses that might     
help to clarify unusual values.  Generally, values were retained unless they    
could not possibly be true, in which case they were changed to "Blank but       
applicable."  Therefore, the user must review each data set for extreme or      
inconsistent values and determine the status of each value for analysis.        
                                                                                
Several editing conventions were used in the creation of final analytic         
data sets:                                                                      
                                                                                
1.   Standardized variables were created to replace all two-part                
     quantity/unit questions using standard conversion factors.                 
     Standardized variables have the same name as the variable of the           
     two-part question with an "S" suffix.  For instance, MAPF18S (Months       
     received WIC benefits) in the MEC Adult Questionnaire was created from     
     the two-part response option to question F18, "How long did you receive    
     benefits from the WIC program?," using the conversion factor 12 months     
     per year.                                                                  
                                                                                
2.   Recoded variables were created by combining responses from two or more     
     like variables, or by collapsing responses to create a summary             
     variable for the purpose of confidentiality.  Recoded variables have the   
     original variable name with an R suffix.  For example, place of birth      
     variable (HFA6X) in the Family Questionnaire was collapsed to a three      
     level response category (U.S., Mexico, Other) and renamed HFA6XR.          
     Generally, only the recoded variable has been included in the data file.   
                                                                                
                                                                               
3.   Fill values, a series of one or more digits, were used to represent        
     certain specific conditions or responses.  Below is a list of the fill     
     values that were employed.  Some of the fill values pertain only to        
     questionnaire data, although 8-fill and blank-fill values are found in     
     all data sets.  Other fill values, not included in this list, are used     
     to represent component-specific conditions.                                
                                                                                
     6-fills = Varies/varied. (Questionnaires only)                             
                                                                                
     7-fills = Fewer than the smallest number that could be reported within     
     the question structure (e.g., fewer than one cigarette per day).           
     (Questionnaires only)                                                      
                                                                                
     8-fills = Blank but applicable/cannot be determined.  This means that      
     a respondent was eligible to receive the question, test, or component      
     but did not because of refusal, lack of time, lack of staff, loss of       
     data, broken vial, language barrier, unreliability, or other similar       
     reasons.                                                                   
                                                                                
     9-fills = Don't know.  This fill was used only when a respondent did       
     not know the response to a question and said, "I don't know."              
     (Questionnaires only)                                                      
                                                                                
     Blank fills = Inapplicable.  If a respondent was not eligible for a        
     questionnaire, test, or component because of age, gender, or specific      
     reason, the variable was blank-filled.  In the questionnaire, if a         
     respondent was not asked a question because of a skip-pattern,             
     variables corresponding to the question were blank-filled.  For            
     examination or laboratory components, if a person was excluded by a        
     defined protocol (e.g., screening exclusion questions) and these           
     criteria are included in the data set, then the corresponding              
     variables were blank-filled for that person.  For home examinees,          
     variables for examination components and blood tests not performed as      
     part of the home examination protocol were blank-filled.                   
                                                                                
4.   For variables describing discrete data, codes of zero (0) were used to     
     mean "none," "never," or the equivalent.  Value labels for which "0"       
     is used include:  "has not had," "never regularly," "still taking," or     
     "never stopped using."  Unless otherwise labeled, for variables            
     containing continuous data, "zero" means "zero.                            
                                                                                
5.   Where there are logical skip patterns in the flow of the questionnaire     
     or examination component, the skip was indicated by placing the            
     variable label of the skip destination in parentheses as part of the       
     value label of the response generating the skip.  For example, in the      
     Physical Function Evaluation, the variable PFPWC (in wheelchair) has a     
     value label, "2  No (PFPSCOOT)" that means that the next item for          
     persons not in a wheelchair would be represented by the variable,          
     PFPSCOOT.                                                                  
                                                                                
                                                                                
Variable Nomenclature                                                           
                                                                                
A unique name was assigned to every NHANES III variable using a standard        
convention.  By following this naming convention, the origin of each            
variable is clear, and there is no chance of overlaying similar variables       
across multiple components.  Variables range in length from three to eight      
characters.  The first two variable characters represent the topic (e.g.,       
analyte, questionnaire instrument, examination component) and are listed        
below alphabetically by topic.  For questionnaires administered in the          
household, the remainder of the variable name following the first two           
                                                                               
characters indicates the question section and number.  For example, data        
for the response to the Household Adult Questionnaire question B1 are           
contained in the variable HAB1.  For most laboratory and examination            
variables, as well as some other variables, a "P" in the third position         
refers to "primary" and the remainder of the variable name is a brief           
description of the item.  For instance, in the Laboratory Data File,            
information on the length of time the person fasted before the first blood      
draw is contained in the variable PHPFAST.  The variable PHPFAST was derived    
as follows:  characters 1-2 (PH) refer to "phlebotomy," character 3 (P)         
refers to "primary," characters 4-8 (FAST) refer to an abbreviation for         
"fasting."                                                                      
                                                                                
                                                                                
CODE           TOPIC                                                            
                                                                                
AT             Alanine aminotransferase (from biochemistry profile)             
AM             Albumin (from biochemistry profile)                              
AP             Alkaline phosphatase (from biochemistry profile)                 
AL             Allergy skin test                                                
AC             Alpha carotene                                                   
AN             Anisocytosis                                                     
AA             Apolipoprotein (AI)                                              
AB             Apolipoprotein (B)                                               
AS             Aspartate aminotransferase (from biochemistry profile)           
LA             Atypical lymphocyte                                              
AU             Audiometry                                                       
BA             Band                                                             
BO             Basophil                                                         
BS             Basophilic stippling                                             
BC             Beta carotene                                                    
BX             Beta cryptoxanthin                                               
BL             Blast                                                            
BU             Blood urea nitrogen (BUN) (from biochemistry profile)            
BM             Body measurements                                                
BD             Bone densitometry                                                
C1             C-peptide (first venipuncture)                                   
C2             C-peptide (second venipuncture)                                  
CR             C-reactive protein                                               
UD             Cadmium                                                          
CN             Central nervous system function evaluation                       
CL             Chloride (from biochemistry profile)                             
CO             Cotinine                                                         
CE             Creatinine (serum)(from biochemistry profile)                    
UR             Creatinine (urine)                                               
DM             Demographic                                                      
DE             Dental examination                                               
MQ             Diagnostic interview schedule                                    
DR             Dietary recall (total nutrient intakes)                          
EO             Eosinophil                                                       
EP             Erythrocyte protoporphyrin                                       
FR             Ferritin                                                         
FB             Fibrinogen                                                       
RB             Folate (RBC)                                                     
FO             Folate (serum)                                                   
FH             Follicle stimulating hormone (FSH)                               
FP             Fundus photography                                               
                                                                                
                                                                               
CODE           TOPIC                                                            
                                                                                
GG             Gamma glutamyl transferase (GGT) (from biochemistry profile)     
GU             Gallbladder ultrasonography                                      
GB             Globulin (from biochemistry profile)                             
G1             Glucose (first venipuncture)                                     
G2             Glucose (second venipuncture)                                    
SG             Glucose (from biochemistry profile)                              
GH             Glycated hemoglobin                                              
GR             Granulocyte                                                      
C3             HCO3 (Bicarbonate)(from biochemistry profile)                    
HD             HDL cholesterol                                                  
HP             Helicobacter pylori antibody                                     
HT             Hematocrit                                                       
HG             Hemoglobin                                                       
AH             Hepatitis A antibody (HAV)                                       
HB             Hepatitis B core antibody (anti-HBc)                             
SS             Hepatitis B surface antibody (anti-HBs)                          
SA             Hepatitis B surface antigen (HBsAg)                              
HC             Hepatitis C antibody (HCV)                                       
DH             Hepatitis D antibody (HDV)                                       
H1             Herpes 1 antibody                                                
H2             Herpes 2 antibody                                                
HX             Home examination (general)                                       
HF             Household family questionnaire                                   
HA             Household adult questionnaire                                    
HQ             Household questionnaire variables (composite)                    
HS             Household screener questionnaire                                 
HY             Household youth questionnaire                                    
HZ             Hypochromia                                                      
I1             Insulin (first venipuncture)                                     
I2             Insulin (second venipuncture)                                    
UI             Iodine (urine)                                                   
FE             Iron                                                             
SF             Iron (from biochemistry profile)                                 
LD             Lactate dehydrogenase (from biochemistry profile)                
L1             Latex antibody                                                   
LC             LDL cholesterol (calculated)                                     
PB             Lead                                                             
LP             Lipoprotein (a)                                                  
LH             Luteinizing hormone                                              
LU             Lutein/zeaxanthin                                                
LY             Lycopene                                                         
LM             Lymphocyte                                                       
MR             Macrocyte                                                        
MC             Mean cell hemoglobin (MCH)                                       
MH             Mean cell hemoglobin concentration (MCHC)                        
MV             Mean cell volume (MCV)                                           
PV             Mean platelet volume                                             
MA             MEC adult questionnaire                                          
MX             MEC examination (general)                                        
FF             Dietary food frequency (ages 12-16 years)                        
MP             MEC proxy questionnaire                                          
MY             MEC youth questionnaire                                          
ME             Metamyelocyte                                                    
MI             Microcyte                                                        
MO             Monocyte                                                         
MN             Mononuclear cell                                                 
ML             Myelocyte                                                        
                                                                                
                                                                               
CODE           TOPIC                                                            
                                                                                
IC             Normalized calcium (derived from ionized calcium)                
OS             Osmolality (from biochemistry profile)                           
PH             Phlebotomy data collected in MEC (e.g., questions)               
PS             Phosphorus (from biochemistry profile)                           
PF             Physical function evaluation                                     
PE             Physician's examination                                          
PL             Platelet                                                         
DW             Platelet distribution width                                      
PK             Poikilocytosis                                                   
PO             Polychromatophilia                                               
SK             Potassium (from biochemistry profile)                            
PR             Promyelocyte                                                     
RC             Red blood cell count (RBC)                                       
RW             Red cell distribution width (RDW)                                
RE             Retinyl esters                                                   
RF             Rheumatoid factor antibody                                       
RU             Rubella antibody                                                 
WT             Sample weights                                                   
SE             Selenium                                                         
SI             Sickle cell                                                      
NA             Sodium (from biochemistry profile)                               
SH             Spherocyte                                                       
SP             Spirometry                                                       
SD             Survey design                                                    
TT             Target cell                                                      
TE             Tetanus                                                          
TB             Total bilirubin (from biochemistry profile)                      
CA             Total calcium                                                    
SC             Total calcium (from biochemistry profile)                        
TC             Total cholesterol                                                
CH             Total cholesterol (from biochemistry profile)                    
TI             Total iron binding capacity (TIBC)                               
TP             Total protein (from biochemistry profile)                        
TX             Toxic granulation                                                
TO             Toxoplasmosis antibody                                           
PX             Transferrin saturation                                           
TG             Triglycerides                                                    
TR             Triglycerides (from biochemistry profile)                        
TY             Tympanometry                                                     
UA             Uric acid (from biochemistry profile)                            
UB             Urinary albumin                                                  
VU             Vacuolated cells                                                 
VR             Varicella antibody                                               
VA             Vitamin A                                                        
VB             Vitamin B12                                                      
VC             Vitamin C                                                        
VE             Vitamin E                                                        
WC             White blood cell count (WBC)                                     
WW             WISC/WRAT cognitive test                                         
                                                                                
                                                                               
                             GENERAL REFERENCES                                 
                                                                                
                                                                                
Delgado JL, Johnson CL, Roy I, Trevino FM.  Hispanic Health and Nutrition       
Examination Survey:  methodological considerations.  Amer J Pub Health          
80(suppl.):6-10.  1990.                                                         
                                                                                
Engel A, Murphy RS, Maurer K, Collins E.  Plan and operation of the HANES I     
Augmentation Survey of Adults 25-74 Years, United States, 1974-75.              
National Center for Health Statistics.  Vital Health Stat 1(14).  1978.         
                                                                                
Freeman DH, Freeman JL, Brock DB, Koch GG.  Strategies in the multivariate      
analysis of data from complex surveys II:  an application to the United         
States National Health Interview Survey.  Int Stat Rev 40(3):317-30.  1976.     
                                                                                
Khare M, Mohadjer LK, Ezzati-Rice TM, Waksberg J.  An evaluation of             
nonresponse bias in NHANES III (1988-91).  1994 Proceedings of the Survey       
Research Methods section of the American Statistical Association.  1994.        
                                                                                
Landis JR, Lepkowski JM, Eklund SA, Stehouwer SA.  A statistical                
methodology for analyzing data from a complex survey, the first National        
Health and Nutrition Examination Survey.  National Center for Health            
Statistics.  Vital Health Stat 2(92).  1982.                                    
                                                                                
McDowell A, Engel A, Massey JT, Maurer K.  Plan and operation of the second     
National Health and Nutrition Examination Survey, 1976-80.  National Center     
for Health Statistics.  Vital Health Stat 1(15).  1981.                         
                                                                                
Miller HW.  Plan and operation of the Health and Nutrition Examination          
Survey, United States, 1971-1973.  National Center for Health Statistics.       
Vital Health Stat 1(10a) and (10b).  1973.                                      
                                                                                
National Center for Health Statistics.  Plan and initial program of the         
Health Examination Survey.  Vital Health Stat 1(4).  1965.                      
                                                                                
National Center for Health Statistics.  Plan and operation of a health          
examination survey of U.S. youths 12-17 years of age.  Vital Health Stat        
1(8).  1969.                                                                    
                                                                                
National Center for Health Statistics.  Plan and operation of the Hispanic      
Health and Nutrition Examination Survey, 1982-84.  Vital Health Stat 1(19).     
1985.                                                                           
                                                                                
National Center for Health Statistics.  Plan and operation of the Third         
National Health and Nutrition Examination Survey, 1988-94.  Vital Health        
Stat 1(32).  1994.                                                              
                                                                                
National Center for Health Statistics.  Plan, operation, and response           
results of a program of children's examinations.  Vital Health Stat 1(5).       
1967.                                                                           
                                                                                
Shah BV, Barnwell BG, Bieler GS.  SUDAAN User's Manual: Software for            
Analysis of Correlated Data.  Research Triangle Park, NC:  Research Triangle    
Institute.  Release 6.04.  1995.                                                
                                                                                
Skinner CJ.  Aggregated analysis:  standard errors and significance tests.      
In:  Skinner CJ, Holt D, Smith TMF, eds.  Analysis of complex surveys.  New     
York:  John Wiley and Sons, Inc.  1989.                                         
                                                                                
                                                                               
U.S. Department of Health and Human Services (DHHS).  National Center for       
Health Statistics.  NHANES III reference manuals and reports (CD-ROM).          
Hyattsville, MD:  Centers for Disease Control and Prevention, 1996.             
Available from National Technical Information Service (NTIS), Springfield,      
VA.  Acrobat .PDF format; includes access software:  Adobe Systems, Inc.        
Acrobat Reader 2.1.                                                             
                                                                                
Westat, Inc.  A User's Guide to WesVarPC.  Rockville, MD.  Westat, Inc.         
1996.                                                                           
                                                                                
Yetley E, Johnson C.  Nutritional applications of the Health and Nutrition      
Examination Surveys (HANES).  Annu Rev Nutr 7:441-63. 1987.                     
                                                                                
                                                                               
                       NHANES III LABORATORY DATA FILE                          
                                                                                
                             General Information                                
                                                                                
                                                                                
Introduction                                                                    
                                                                                
The Laboratory Data File contains data from the urine collection and            
venipuncture components of the examination, including almost all laboratory     
test results (blood and urine) available to date.  The exceptions are           
discussed elsewhere in this documentation.  In addition, auxiliary              
information such as how long the examinee fasted, the time of day of the        
venipuncture, and the conditions precluding venipuncture has been included.     
This documentation presents information that should be reviewed before          
proceeding with data analysis.                                                  
                                                                                
The documentation pertaining specifically to the Laboratory Data File is        
divided into four main sections.  The first section, "General Information,"     
provides information about the contents of the Laboratory Data File.  The       
second section, "Data File Index," includes a brief description of all the      
variables on the data set and shows the standard name of each variable and      
its position in the data set.  The third section, "Item Descriptions,           
Codes, Counts, and Notes" provides for each component a description, the        
standard variable name and a brief description of the values that variable      
can take on, a count of the frequency of occurrence of each value, notes by     
variable, and appendices as necessary. "References" are provided in the         
fourth section.                                                                 
                                                                                
Blood and urine specimens were collected on examinees aged one year and         
older at the mobile examination center (MEC).  For those examinees aged one     
year and older who did not travel to the MEC, only blood specimens were         
collected during the Home Examination (HE).  Hematologic profiles were          
completed for all examinees, and specified laboratory tests were performed      
upon each specimen based on the examinee's age and sex.  Only a limited         
number of tests were performed on specimens collected during the Home           
Examination.  Appendix 1 lists the laboratory tests by specimen type, age       
group, sex, and whether the specimen was collected in the Home Examination.     
                                                                                
The analysis of NHANES III laboratory data must be conducted with the key       
survey design and basic demographic variables.  The NHANES III Household        
Youth Questionnaire Data File (ages two months to 16 years) and the NHANES      
III Household Adult Questionnaire Data File (ages 17 years and older)           
contain demographic data, health indicators, and other related information      
collected during household interviews.  They also contain all survey design     
variables and sample weights for these age groups.  These two household         
questionnaire files may be linked to the laboratory data file using the         
unique survey participant (sample person) identifier SEQN.                      
                                                                                
                                                                                
Examinee Screening                                                              
                                                                                
Prior to the phlebotomy (venipuncture), a questionnaire was administered to     
determine an examinee's eligibility for all phlebotomy procedures               
(including venipuncture and the oral glucose tolerance test).  It included      
questions to determine if it was safe to perform the venipuncture, to           
document and determine fasting compliance, and to aid in analyzing the          
results of the laboratory tests performed.  Examinees reporting hemophilia or   
recent cancer chemotherapy treatment were excluded from the venipuncture.       
For those examinees, the laboratory test results fields for all blood-based     
                                                                                
                                                                               
laboratory tests were left blank.  Because examinees reporting current          
insulin therapy were excluded from receiving the oral glucose tolerance test    
(OGTT), the plasma glucose (G2P), serum insulin (I2P) and serum C-peptide       
(C2P) results from the second venipuncture were left blank as well.             
                                                                                
Although examinees aged 12 years and older were instructed to fast for          
10-16 hours prior to the morning examination or for six hours before the        
afternoon or evening examination, the instructions were not followed            
uniformly.  Laboratory test results and the duration of the fast have been      
included on the data file regardless of the examinee's fasting compliance.      
Analysts should consider whether fasting status is crucial before undertaking   
analyses.  Examinees who reported insulin use during the household              
interview were not instructed to fast.                                          
                                                                                
                                                                                
Specimen Collection and Processing Procedures                                   
                                                                                
Detailed specimen collection and processing instructions are discussed in       
the Manual for Medical Technicians (U.S. DHHS, 1996).  Vials were stored        
under appropriate refrigerated (4-8 degrees Centigrade) or frozen (-20          
degrees Centigrade) conditions until they were shipped to analytical            
laboratories for testing.  The analytical methods used by each of the           
participating laboratories are described in the Laboratory Procedures Used      
for  NHANES III (U.S. DHHS, 1996).  The manual contains quality control         
graphs and statistical summary information for each laboratory test at the      
end of the laboratory method description.                                       
                                                                                
Oral glucose tolerance testing:  During NHANES III, the OGTT was conducted      
on MEC examinees aged 40-74 years.  The protocol included two timed             
venipunctures and a glucose drink.  Two glucose drinks were used to measure     
an examinee's ability to metabolize glucose -- Dextol(TM) and Trutol(TM).       
After the first venipuncture, the examinee drank the glucose drink, and a       
second venipuncture was performed approximately two hours later.                
                                                                                
                                                                                
Examiner Training and Quality Control                                           
                                                                                
The NHANES III laboratory staff consisted of medical technologists and          
phlebotomists.  The medical technologists held baccalaureates in medical        
technology.  Both they and the phlebotomists were certified by the American     
Society for Clinical Pathologists or by a similar organization.                 
                                                                                
All laboratory staff completed comprehensive training in standardized           
laboratory procedures before they began working in the MEC.  The MEC            
phlebotomists completed comprehensive training in pediatric phlebotomy          
techniques, including instruction by a pediatric nurse practitioner.            
Laboratory team performance was monitored using several techniques.  NCHS       
and contract consultants used a structured quality assurance evaluation         
during unscheduled visits to evaluate both the quality of the laboratory work   
and the quality-control procedures.  Each laboratory staff person was           
observed for equipment operation, specimen collection and preparation, and      
testing procedures, and constructive feedback was given to each team.  Formal   
retraining sessions were conducted annually to ensure that required skill       
levels were maintained.                                                         
                                                                                
                                                                                
Laboratory Protocol Changes from 1988 to 1994                                   
                                                                                
Most laboratory tests were performed for the entire six years of NHANES         
III.  Exceptions are detailed below.  Apolipoprotein AI and B tests were        
included during 1988-1991 only.  Lipoprotein(a), Vitamin B12, and antibody      
                                                                               
tests for immunoglobulin E, rubella, varicella, and toxoplasmosis were          
conducted during 1991-1994.  For the 1991-1994 period, the OGTT procedure was   
modified to add tests for C-peptide and insulin on specimens from the second    
venipuncture.  For statistical analyses of these laboratory test results, the   
appropriate Phase 1 or Phase 2 sample weight should be used.                    
                                                                                
                                                                                
Incomplete Data Release                                                         
                                                                                
At the time of this data release, some laboratory test results were not         
available.  Tests for which results were unavailable included vitamin D,        
immunoglobulin E, diphtheria antitoxin, measles antibody, homocysteine,         
periodontal pathogens, thyroxine, thyroid stimulating hormone,                  
antithyroglobulin antibody, antimicrosomal antibody, and methylmalonic          
acid.  Cotinine test results for 1988-1991 have been included in this           
laboratory data file.  Cotinine testing is still being carried out for          
1991-1994, and the laboratory test results will be released at a future date.   
Results from urine pregnancy tests are included in the NHANES III Examination   
Data File, rather than in the Laboratory Data File.                             
                                                                                
Serologic testing for human immunodeficiency virus (HIV) antibody and urine     
testing for drugs of abuse were performed anonymously.  The drugs of abuse      
for which examinees were tested were cocaine, marijuana, opiates,               
phencyclidine, and amphetamines.  To maintain anonymity, the examinee's         
serum and urine were labeled with a random identifying number, and limited      
demographic data were linked to that number.  The new identifier was not        
linked to the original sample identifier.  Therefore, these data cannot be      
linked to other NHANES III data.  The HIV test was performed from 1988          
through 1994; the urine drug testing was done from 1991 through 1994.           
Because of the limited analytic potential of the HIV and drug data, this        
file is not included in this data release.                                      
                                                                                
                                                                                
Data Preparation and Processing                                                 
                                                                                
For laboratory tests with a lower detection limit, results below the lower      
detection limit were replaced with a value equal to the detection limit         
divided by the square root of two.  This value was created to help the user     
distinguish a nondetectable laboratory test result from a measured              
laboratory test result.  Appendix 2 documents the detection limit for each      
laboratory test.                                                                
                                                                                
The SI unit (le Systeme International d Unites) is an outgrowth of the          
metric system that has been used throughout most of the world.  In addition     
to providing a uniform international system of units of measurement, a          
uniform style is prescribed.  Laboratory test results not originally reported   
in SI units were converted to SI units if applicable.  Conversion factors,      
the format of the NHANES and SI results, and NHANES and SI units of measure     
are in Appendix 3.  In converting NHANES III data to SI units, the goal was     
to preserve the level of detail reported by the laboratories in the original    
laboratory test result.  Therefore, the number of significant digits in the     
laboratory test results data may be different from that in published            
references.                                                                     
                                                                                
                                                                               
The Laboratory Data File contains laboratory test results for glucose           
(G1P), triglycerides (TGP), cholesterol (TCP), and iron (FEP) measured by       
contract laboratories using reference analytic methods.  For these methods,     
consult the Laboratory Procedures Used for NHANES III (U.S. DHHS, 1996).        
However, the biochemistry profile also included measurements of these           
analytes.  In general, for most analyses, the appropriate variables to use      
are G1P, TGP, TCP and FEP.  The values from the biochemistry profile (SGP,      
CHP, TRP, SFP) should not be used routinely.                                    
                                                                                
                                                                                
The definition of a reference method by the National Committee for Clinical     
Laboratory Standards (NCCLS) is "a thoroughly investigated method in which      
exact and clear descriptions of the necessary conditions and procedures are     
given for the accurate determination of one or more property values; the        
documented accuracy and precision of the method are commensurate with the       
method's use for assessing the accuracy of other methods for measuring the      
same property values or for assigning reference method values to reference      
materials" (NCCLS, 1991).                                                       
                                                                                
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
                                                                                
    DEMOGRAPHIC DATA                                                            
        HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                                  
                                                                                
    Sample person identification number .........  SEQN                 1-5     
                                                                                
    Family sequence number ......................  DMPFSEQ             6-10     
    Examination/interview Status ................  DMPSTAT               11     
                                                                                
    Race-ethnicity ..............................  DMARETHN              12     
    Race ........................................  DMARACER              13     
    Ethnicity ...................................  DMAETHNR              14     
                                                                                
    Sex .........................................  HSSEX                 15     
                                                                                
    Age at interview (Screener) .................  HSAGEIR            16-17     
    Age at interview - unit (Screener) ..........  HSAGEU                18     
    Age in months at interview (screener) .......  HSAITMOR           19-22     
                                                                                
    Family size (persons in family) .............  HSFSIZER           23-24     
    Household size (persons in dwelling) ........  HSHSIZER           25-26     
                                                                                
    County code .................................  DMPCNTYR           27-29     
    FIPS code for State .........................  DMPFIPSR           30-31     
    Rural/urban code based on USDA code .........  DMPMETRO              32     
                                                                                
    Census region, weighting(Texas in south) ....  DMPCREGN              33     
    Poverty Income Ratio (unimputed income) .....  DMPPIR             34-39     
                                                                                
        SURVEY DESIGN DATA                                                      
                                                                                
    Phase of NHANES III survey ..................  SDPPHASE              40     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Total NHANES III pseudo-PSU .................  SDPPSU6               41     
    Total NHANES III pseudo-stratum .............  SDPSTRA6           42-43     
    Pseudo-PSU for phase 1 ......................  SDPPSU1               44     
    Pseudo-stratum for phase 1 ..................  SDPSTRA1           45-46     
    Pseudo-PSU for phase 2 ......................  SDPPSU2               47     
    Pseudo-stratum for phase 2 ..................  SDPSTRA2           48-49     
                                                                                
        SAMPLING WEIGHTS - TOTAL NHANES III (1988-94)                           
                                                                                
    Total interviewed sample final weight .......  WTPFQX6            50-58     
    Total MEC-examined sample final weight ......  WTPFEX6            59-67     
    Total M+H examined sample final weight ......  WTPFHX6            68-76     
    Total allergy subsample final weight ........  WTPFALG6           77-85     
    Total CNS subsample final weight ............  WTPFCNS6           86-94     
    Total morning subsample final wgt ...........  WTPFSD6           95-103     
    Total afternoon/eve subsample final wgt .....  WTPFMD6          104-112     
    Total M+H morning subsample final wgt .......  WTPFHSD6         113-121     
    Total M+H afternoon subsample final wgt .....  WTPFHMD6         122-130     
                                                                                
        SAMPLING WEIGHTS - NHANES III PHASE 1 (1988-91)                         
                                                                                
    Phase 1 interviewed sample final wgt ........  WTPFQX1          131-139     
    Phase 1 MEC examined sample final wgt .......  WTPFEX1          140-148     
    Phase 1 M+H examined sample final wgt .......  WTPFHX1          149-157     
    Phase 1 allergy subsample final wgt .........  WTPFALG1         158-166     
    Phase 1 CNS subsample final wgt .............  WTPFCNS1         167-175     
    Phase 1 morning sess subsample final wgt ....  WTPFSD1          176-184     
    Phase 1 aft/eve subsample final wgt .........  WTPFMD1          185-193     
    Phase 1 morning M+H subsample final wgt .....  WTPFHSD1         194-202     
    Phase 1 aft/eve M+H subsample final wgt .....  WTPFHMD1         203-211     
                                                                                
        SAMPLING WEIGHTS - NHANES III PHASE 2 (1991-94)                         
                                                                                
    Phase 2 interviewed sample final wgt ........  WTPFQX2          212-220     
    Phase 2 MEC examined sample final wgt .......  WTPFEX2          221-229     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Phase 2 M+H examined sample final wgt .......  WTPFHX2          230-238     
    Phase 2 allergy subsample final wgt .........  WTPFALG2         239-247     
    Phase 2 CNS subsample final wgt .............  WTPFCNS2         248-256     
    Phase 2 morning sess subsample final wgt ....  WTPFSD2          257-265     
    Phase 2 aft/eve subsample final wgt .........  WTPFMD2          266-274     
    Phase 2 morning M+H subsample final wgt .....  WTPFHSD2         275-283     
    Phase 2 aft/eve M+H subsample final wgt .....  WTPFHMD2         284-292     
                                                                                
        FAY'S BRR REPLICATE INTERVIEW WEIGHTS - TOTAL NHANES III (1988-94)      
                                                                                
    Replicate 1 final interview weight ..........  WTPQRP1          293-301     
    Replicate 2 final interview weight ..........  WTPQRP2          302-310     
    Replicate 3 final interview weight ..........  WTPQRP3          311-319     
    Replicate 4 final interview weight ..........  WTPQRP4          320-328     
    Replicate 5 final interview weight ..........  WTPQRP5          329-337     
    Replicate 6 final interview weight ..........  WTPQRP6          338-346     
    Replicate 7 final interview weight ..........  WTPQRP7          347-355     
    Replicate 8 final interview weight ..........  WTPQRP8          356-364     
    Replicate 9 final interview weight ..........  WTPQRP9          365-373     
    Replicate 10 final interview weight .........  WTPQRP10         374-382     
    Replicate 11 final interview weight .........  WTPQRP11         383-391     
    Replicate 12 final interview weight .........  WTPQRP12         392-400     
    Replicate 13 final interview weight .........  WTPQRP13         401-409     
    Replicate 14 final interview weight .........  WTPQRP14         410-418     
    Replicate 15 final interview weight .........  WTPQRP15         419-427     
    Replicate 16 final interview weight .........  WTPQRP16         428-436     
    Replicate 17 final interview weight .........  WTPQRP17         437-445     
    Replicate 18 final interview weight .........  WTPQRP18         446-454     
    Replicate 19 final interview weight .........  WTPQRP19         455-463     
    Replicate 20 final interview weight .........  WTPQRP20         464-472     
    Replicate 21 final interview weight .........  WTPQRP21         473-481     
    Replicate 22 final interview weight .........  WTPQRP22         482-490     
    Replicate 23 final interview weight .........  WTPQRP23         491-499     
    Replicate 24 final interview weight .........  WTPQRP24         500-508     
    Replicate 25 final interview weight .........  WTPQRP25         509-517     
    Replicate 26 final interview weight .........  WTPQRP26         518-526     
    Replicate 27 final interview weight .........  WTPQRP27         527-535     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Replicate 28 final interview weight .........  WTPQRP28         536-544     
    Replicate 29 final interview weight .........  WTPQRP29         545-553     
    Replicate 30 final interview weight .........  WTPQRP30         554-562     
    Replicate 31 final interview weight .........  WTPQRP31         563-571     
    Replicate 32 final interview weight .........  WTPQRP32         572-580     
    Replicate 33 final interview weight .........  WTPQRP33         581-589     
    Replicate 34 final interview weight .........  WTPQRP34         590-598     
    Replicate 35 final interview weight .........  WTPQRP35         599-607     
    Replicate 36 final interview weight .........  WTPQRP36         608-616     
    Replicate 37 final interview weight .........  WTPQRP37         617-625     
    Replicate 38 final interview weight .........  WTPQRP38         626-634     
    Replicate 39 final interview weight .........  WTPQRP39         635-643     
    Replicate 40 final interview weight .........  WTPQRP40         644-652     
    Replicate 41 final interview weight .........  WTPQRP41         653-661     
    Replicate 42 final interview weight .........  WTPQRP42         662-670     
    Replicate 43 final interview weight .........  WTPQRP43         671-679     
    Replicate 44 final interview weight .........  WTPQRP44         680-688     
    Replicate 45 final interview weight .........  WTPQRP45         689-697     
    Replicate 46 final interview weight .........  WTPQRP46         698-706     
    Replicate 47 final interview weight .........  WTPQRP47         707-715     
    Replicate 48 final interview weight .........  WTPQRP48         716-724     
    Replicate 49 final interview weight .........  WTPQRP49         725-733     
    Replicate 50 final interview weight .........  WTPQRP50         734-742     
    Replicate 51 final interview weight .........  WTPQRP51         743-751     
    Replicate 52 final interview weight .........  WTPQRP52         752-760     
                                                                                
        FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)    
                                                                                
    Replicate 1 final exam weight ...............  WTPXRP1          761-769     
    Replicate 2 final exam weight ...............  WTPXRP2          770-778     
    Replicate 3 final exam weight ...............  WTPXRP3          779-787     
    Replicate 4 final exam weight ...............  WTPXRP4          788-796     
    Replicate 5 final exam weight ...............  WTPXRP5          797-805     
    Replicate 6 final exam weight ...............  WTPXRP6          806-814     
    Replicate 7 final exam weight ...............  WTPXRP7          815-823     
    Replicate 8 final exam weight ...............  WTPXRP8          824-832     
    Replicate 9 final exam weight ...............  WTPXRP9          833-841     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Replicate 10 final exam weight ..............  WTPXRP10         842-850     
    Replicate 11 final exam weight ..............  WTPXRP11         851-859     
    Replicate 12 final exam weight ..............  WTPXRP12         860-868     
    Replicate 13 final exam weight ..............  WTPXRP13         869-877     
    Replicate 14 final exam weight ..............  WTPXRP14         878-886     
    Replicate 15 final exam weight ..............  WTPXRP15         887-895     
    Replicate 16 final exam weight ..............  WTPXRP16         896-904     
    Replicate 17 final exam weight ..............  WTPXRP17         905-913     
    Replicate 18 final exam weight ..............  WTPXRP18         914-922     
    Replicate 19 final exam weight ..............  WTPXRP19         923-931     
    Replicate 20 final exam weight ..............  WTPXRP20         932-940     
    Replicate 21 final exam weight ..............  WTPXRP21         941-949     
    Replicate 22 final exam weight ..............  WTPXRP22         950-958     
    Replicate 23 final exam weight ..............  WTPXRP23         959-967     
    Replicate 24 final exam weight ..............  WTPXRP24         968-976     
    Replicate 25 final exam weight ..............  WTPXRP25         977-985     
    Replicate 26 final exam weight ..............  WTPXRP26         986-994     
    Replicate 27 final exam weight ..............  WTPXRP27        995-1003     
    Replicate 28 final exam weight ..............  WTPXRP28       1004-1012     
    Replicate 29 final exam weight ..............  WTPXRP29       1013-1021     
    Replicate 30 final exam weight ..............  WTPXRP30       1022-1030     
    Replicate 31 final exam weight ..............  WTPXRP31       1031-1039     
    Replicate 32 final exam weight ..............  WTPXRP32       1040-1048     
    Replicate 33 final exam weight ..............  WTPXRP33       1049-1057     
    Replicate 34 final exam weight ..............  WTPXRP34       1058-1066     
    Replicate 35 final exam weight ..............  WTPXRP35       1067-1075     
    Replicate 36 final exam weight ..............  WTPXRP36       1076-1084     
    Replicate 37 final exam weight ..............  WTPXRP37       1085-1093     
    Replicate 38 final exam weight ..............  WTPXRP38       1094-1102     
    Replicate 39 final exam weight ..............  WTPXRP39       1103-1111     
    Replicate 40 final exam weight ..............  WTPXRP40       1112-1120     
    Replicate 41 final exam weight ..............  WTPXRP41       1121-1129     
    Replicate 42 final exam weight ..............  WTPXRP42       1130-1138     
    Replicate 43 final exam weight ..............  WTPXRP43       1139-1147     
    Replicate 44 final exam weight ..............  WTPXRP44       1148-1156     
    Replicate 45 final exam weight ..............  WTPXRP45       1157-1165     
    Replicate 46 final exam weight ..............  WTPXRP46       1166-1174     
    Replicate 47 final exam weight ..............  WTPXRP47       1175-1183     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Replicate 48 final exam weight ..............  WTPXRP48       1184-1192     
    Replicate 49 final exam weight ..............  WTPXRP49       1193-1201     
    Replicate 50 final exam weight ..............  WTPXRP50       1202-1210     
    Replicate 51 final exam weight ..............  WTPXRP51       1211-1219     
    Replicate 52 final exam weight ..............  WTPXRP52       1220-1228     
                                                                                
        HOUSEHOLD YOUTH QUESTIONNAIRE (HYQ)                                     
                                                                                
    Age in months at youth interview ............  HYAITMO        1229-1232     
                                                                                
        MEC EXAMINATION                                                         
                                                                                
    Language used by SP in MEC ..................  MXPLANG             1233     
    Session for MEC examination .................  MXPSESSR            1234     
    Day of week of MEC exam .....................  MXPTIDW             1235     
    Age in months at MEC exam ...................  MXPAXTMR       1236-1239     
                                                                                
        HOME EXAMINATION                                                        
                                                                                
    Day of week of home exam ....................  HXPTIDW             1240     
    Age in months at home exam ..................  HXPAXTMR       1241-1244     
    Session for home examination ................  HXPSESSR            1245     
                                                                                
    PHLEBOTOMY SCREENING QUESTIONNAIRE                                          
                                                                                
    Language ....................................  PHPLANG             1246     
    Do you have hemophilia? .....................  PHPHEMO             1247     
    Recent chemo/within the past four weeks .....  PHPCHM2             1248     
    Are you currently taking insulin? ...........  PHPINSU             1249     
    Time participant last ate ...................  PHPSNTI        1250-1254     
    Day participant last ate ....................  PHPSNDA             1255     
    Have you had anything to drink? .............  PHPDRIN             1256     
    Time participant last drank .................  PHPDRTI        1257-1261     
    Day participant last drank ..................  PHPDRDA             1262     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Length of calculated fast (in hours) ........  PHPFAST        1263-1267     
    Time of venipuncture ........................  PHPBEST        1268-1272     
                                                                                
    HEMATOLOGY                                                                  
                                                                                
    White blood cell count ......................  WCP            1273-1277     
    White blood cell count: SI ..................  WCPSI          1278-1282     
    Lymphocyte percent (Coulter) ................  LMPPCNT        1283-1287     
    Mononuclear percent (Coulter) ...............  MOPPCNT        1288-1292     
    Granulocyte percent (Coulter) ...............  GRPPCNT        1293-1297     
    Lymphocyte number (Coulter) .................  LMP            1298-1302     
    Mononuclear number (Coulter) ................  MOP            1303-1306     
    Granulocyte number (Coulter) ................  GRP            1307-1311     
    Red blood cell count ........................  RCP            1312-1315     
    Red blood cell count:  SI ...................  RCPSI          1316-1319     
    Hemoglobin (g/dL) ...........................  HGP            1320-1324     
    Hemoglobin:  SI (g/L) .......................  HGPSI          1325-1329     
    Hematocrit (%) ..............................  HTP            1330-1334     
    Hematocrit:  SI (L/L=1) .....................  HTPSI          1335-1339     
    Mean cell volume:  SI (fL) ..................  MVPSI          1340-1344     
    Mean cell hemoglobin:  SI (pg) ..............  MCPSI          1345-1349     
    Mean cell hemoglobin concentration ..........  MHP            1350-1354     
    Mean cell hemoglobin concentration: SI ......  MHPSI          1355-1359     
    Red cell distribution width (%) .............  RWP            1360-1364     
    Red cell distribution width:SI(fraction) ....  RWPSI          1365-1370     
    Platelet count ..............................  PLP            1371-1375     
    Platelet count:  SI .........................  PLPSI          1376-1380     
    Platelet distribution width (%) .............  DWP            1381-1385     
    Mean platelet volume:  SI (fL) ..............  PVPSI          1386-1390     
    Segment neutrophil(percent of 100 cells) ....  GRPDIF         1391-1393     
    Lymphocytes (percent of 100 cells) ..........  LMPDIF         1394-1396     
    Monocytes (percent of 100 cells) ............  MOPDIF         1397-1398     
    Eosinophils (percent of 100 cells) ..........  EOP            1399-1400     
    Basophils (percent of 100 cells) ............  BOP            1401-1402     
    Blasts (percent of 100 cells) ...............  BLP                 1403     
    Promyelocytes (percent of 100 cells) ........  PRP                 1404     
    Metamyelocytes (percent of 100 cells) .......  MEP                 1405     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Myelocytes (percent of 100 cells) ...........  MLP                 1406     
    Bands (percent of 100 cells) ................  BAP            1407-1408     
    Atyp lymphocytes (percent of 100 cells) .....  LAP            1409-1410     
    Anisocytosis (variation of cell size) .......  ANP                 1411     
    Basophilic stippling ........................  BSP                 1412     
    Hypochromia (stain intensity of cell) .......  HZP                 1413     
    Poikilocytosis (cell shape variation) .......  PKP                 1414     
    Polychromatophilia(bluish color of cell) ....  POP                 1415     
    Macrocytosis (large cell prevalence) ........  MRP                 1416     
    Microcytosis (small cell prevalence) ........  MIP                 1417     
    Sickle cells ................................  SIP                 1418     
    Spherocytosis ...............................  SHP                 1419     
    Target cells ................................  TTP                 1420     
    Toxic granulation ...........................  TXP                 1421     
    Vacuolated cells ............................  VUP                 1422     
                                                                                
    GENERAL BIOCHEMISTRY TESTS                                                  
                                                                                
    Lead (ug/dL) ................................  PBP            1423-1426     
    Lead:  SI (umol/L) ..........................  PBPSI          1427-1431     
    Erythrocyte protoporphyrin (ug/dL) ..........  EPP            1432-1435     
    Erythrocyte protoporphyrin:  SI (umol/L) ....  EPPSI          1436-1440     
    Serum iron (ug/dL) ..........................  FEP            1441-1443     
    Serum iron:  SI (umol/L) ....................  FEPSI          1444-1448     
    Serum TIBC (ug/dL) ..........................  TIP            1449-1452     
    Serum TIBC:  SI (umol/L) ....................  TIPSI          1453-1458     
    Serum transferrin saturation (%) ............  PXP            1459-1462     
    Serum ferritin (ng/mL) ......................  FRP            1463-1466     
    Serum ferritin:  SI (ug/L) ..................  FRPSI          1467-1470     
    Serum folate (ng/mL) ........................  FOP            1471-1475     
    Serum folate:  SI (nmol/L) ..................  FOPSI          1476-1480     
    RBC folate (ng/mL) ..........................  RBP            1481-1484     
    RBC folate:  SI (nmol/L) ....................  RBPSI          1485-1490     
    Serum vitamin B12 (pg/mL) ...................  VBP            1491-1496     
    Serum vitamin B12:  SI (pmol/L) .............  VBPSI          1497-1504     
    Serum vitamin C (mg/dL) .....................  VCP            1505-1508     
    Serum vitamin C:  SI (mmol/L) ...............  VCPSI          1509-1514     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Serum normalized calcium:  SI (mmol/L) ......  ICPSI          1515-1518     
    Serum total calcium:  SI (mmol/L) ...........  CAPSI          1519-1522     
    Serum selenium (ng/mL) ......................  SEP            1523-1526     
    Serum selenium:  SI (nmol/L) ................  SEPSI          1527-1530     
    Serum vitamin A (ug/dL) .....................  VAP            1531-1533     
    Serum vitamin A:  SI (umol/L) ...............  VAPSI          1534-1537     
    Serum vitamin E (ug/dL) .....................  VEP            1538-1542     
    Serum vitamin E:  SI (umol/L) ...............  VEPSI          1543-1548     
    Serum alpha carotene (ug/dL) ................  ACP            1549-1551     
    Serum alpha carotene:  SI (umol/L) ..........  ACPSI          1552-1555     
    Serum beta carotene (ug/dL) .................  BCP            1556-1559     
    Serum beta carotene: SI (umol/L) ............  BCPSI          1560-1564     
    Serum beta cryptoxanthin (ug/dL) ............  BXP            1565-1567     
    Serum beta cryptoxanthin:  SI (umol/L) ......  BXPSI          1568-1571     
    Serum lutein/zeaxanthin (ug/dL) .............  LUP            1572-1574     
    Serum lutein/zeaxanthin:  SI (umol/L) .......  LUPSI          1575-1578     
    Serum lycopene (ug/dL) ......................  LYP            1579-1581     
    Serum lycopene:  SI (umol/L) ................  LYPSI          1582-1585     
    Serum sum retinyl esters (ug/dL) ............  REP            1586-1588     
    Serum sum retinyl esters:  SI (umol/L) ......  REPSI          1589-1592     
    Serum cotinine (ng/mL) ......................  COP            1593-1597     
    Serum cholesterol (mg/dL) ...................  TCP            1598-1600     
    Serum cholesterol:  SI (mmol/L) .............  TCPSI          1601-1605     
    Serum triglycerides (mg/dL) .................  TGP            1606-1609     
    Serum triglycerides:  SI (mmol/L) ...........  TGPSI          1610-1614     
    Serum LDL cholesterol (mg/dL) ...............  LCP            1615-1617     
    Serum LDL cholesterol:  SI (mmol/L) .........  LCPSI          1618-1621     
    Serum HDL cholesterol (mg/dL) ...............  HDP            1622-1624     
    Serum HDL cholesterol:  SI (mmol/L) .........  HDPSI          1625-1628     
    Serum apolipoprotein AI (mg/dL) .............  AAP            1629-1631     
    Serum apolipoprotein AI: SI (g/L) ...........  AAPSI          1632-1635     
    Serum apolipoprotein B (mg/dL) ..............  ABP            1636-1638     
    Serum apolipoprotein B: SI (g/L) ............  ABPSI          1639-1642     
    Serum lipoprotein(a) (mg/dL) ................  LPP            1643-1645     
    Serum lipoprotein(a):  SI (g/L) .............  LPPSI          1646-1649     
    Serum FSH:  SI (IU/L) .......................  FHPSI          1650-1654     
    Serum luteinizing hormone: SI (IU/L) ........  LHPSI          1655-1658     
    Plasma fibrinogen (mg/dL) ...................  FBP            1659-1662     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Plasma fibrinogen:  SI (g/L) ................  FBPSI          1663-1666     
    Serum C-reactive protein (mg/dL) ............  CRP            1667-1671     
                                                                                
    ANTIBODY TESTS                                                              
                                                                                
    Serum tetanus antibody (U/mL) ...............  TEP            1672-1677     
    Serum hepatitis A antibody ..................  AHP                 1678     
    Serum hepatitis B core antibody .............  HBP                 1679     
    Serum hepatitis B surface antibody ..........  SSP            1680-1681     
    Serum hepatitis B surface antigen ...........  SAP                 1682     
    Serum hepatitis C antibody ..................  HCP                 1683     
    Serum hepatitis D antibody ..................  DHP                 1684     
    Serum herpes I antibody .....................  H1P                 1685     
    Serum herpes II antibody ....................  H2P                 1686     
    Serum rubella antibody ......................  RUP            1687-1691     
    Serum rubells antibody (IU) .................  RUPUNIT        1692-1695     
    Serum varicella antibody ....................  VRP            1696-1700     
    Serum toxoplasmosis antibody ................  TOP            1701-1703     
    Serum rheumatoid factor antibody ............  RFP            1704-1708     
    Serum latex antibody (IU/mL) ................  L1P            1709-1713     
    Serum helicobacter pylori antibody ..........  HPP                 1714     
                                                                                
    BIOCHEMISTRY PROFILE                                                        
                                                                                
    Serum sodium:  SI (mmol/L) ..................  NAPSI          1715-1719     
    Serum potassium:  SI (mmol/L) ...............  SKPSI          1720-1723     
    Serum chloride:  SI (mmol/L) ................  CLPSI          1724-1728     
    Serum bicarbonate:  SI (mmol/L) .............  C3PSI          1729-1730     
    Serum total calcium (mg/dL) .................  SCP            1731-1734     
    Serum total calcium: SI (mmol/L) ............  SCPSI          1735-1739     
    Serum phosphorus (mg/dL) ....................  PSP            1740-1743     
    Serum phosphorus: SI (mmol/L) ...............  PSPSI          1744-1748     
    Serum uric acid (mg/dL) .....................  UAP            1749-1752     
    Serum uric acid:  SI (umol/L) ...............  UAPSI          1753-1757     
    Serum glucose (mg/dL) .......................  SGP            1758-1760     
    Serum glucose:  SI (mmol/L) .................  SGPSI          1761-1765     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Serum blood urea nitrogen (mg/dL) ...........  BUP            1766-1768     
    Serum blood urea nitrogen:  SI (mmol/L) .....  BUPSI          1769-1773     
    Serum total bilirubin (mg/dL) ...............  TBP            1774-1777     
    Serum total bilirubin:  SI (umol/L) .........  TBPSI          1778-1783     
    Serum creatinine (mg/dL) ....................  CEP            1784-1787     
    Serum creatinine:  SI (umol/L) ..............  CEPSI          1788-1793     
    Serum iron (ug/dL) ..........................  SFP            1794-1796     
    Serum iron:  SI (umol/L) ....................  SFPSI          1797-1800     
    Serum cholesterol (mg/dL) ...................  CHP            1801-1804     
    Serum cholesterol:  SI (mmol/L) .............  CHPSI          1805-1810     
    Serum triglycerides (mg/dL) .................  TRP            1811-1814     
    Serum triglycerides:  SI (mmol/L) ...........  TRPSI          1815-1820     
    Aspartate aminotransferase: SI(U/L) .........  ASPSI          1821-1823     
    Alanine aminotransferase:  SI (U/L) .........  ATPSI          1824-1826     
    Gamma glutamyl transferase: SI(U/L) .........  GGPSI          1827-1830     
    Serum lactate dehydrogenase:  SI (U/L) ......  LDPSI          1831-1834     
    Serum alkaline phosphatase:  SI (U/L) .......  APPSI          1835-1838     
    Serum total protein (g/dL) ..................  TPP            1839-1842     
    Serum total protein:  SI (g/L) ..............  TPPSI          1843-1845     
    Serum albumin (g/dL) ........................  AMP            1846-1848     
    Serum albumin:  SI (g/L) ....................  AMPSI          1849-1851     
    Serum globulin (g/dL) .......................  GBP            1852-1854     
    Serum globulin:  SI (g/L) ...................  GBPSI          1855-1857     
    Serum osmolality:  SI (mmol/Kg) .............  OSPSI          1858-1860     
                                                                                
    DIABETES TESTING PROFILE                                                    
                                                                                
    Glycated hemoglobin: (%) ....................  GHP            1861-1864     
    Glycated hemoglobin: test method ............  GHPMETH             1865     
    Plasma glucose (mg/dL) ......................  G1P            1866-1870     
    Plasma glucose:  SI (mmol/L) ................  G1PSI          1871-1876     
    Incomplete glucose test (OGTT) code .........  G1PCODE        1877-1878     
    Minutes between drink and second draw .......  G1PTIM1        1879-1881     
    Minutes between first and second draw .......  G1PTIM2        1882-1884     
    Second plasma glucose (mg/dL) ...............  G2P            1885-1889     
    Second plasma glucose: SI (mmol/L) ..........  G2PSI          1890-1895     
    Serum C-peptide (pmol/mL) ...................  C1P            1896-1900     
                                                                               
                                                                                
                     NHANES III Laboratory Data File Index                      
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Serum C-peptide: SI (nmol/L) ................  C1PSI          1901-1905     
    Second serum C-peptide (pmol/mL) ............  C2P            1906-1911     
    Second serum C-peptide: SI (nmol/L) .........  C2PSI          1912-1917     
    Serum insulin (uU/mL) .......................  I1P            1918-1923     
    Serum insulin:  SI (pmol/L) .................  I1PSI          1924-1930     
    Serum insulin: test kit .....................  I1P2PFLG            1931     
    Second serum insulin (uU/mL) ................  I2P            1932-1937     
    Second serum insulin: SI (pmol/L) ...........  I2PSI          1938-1944     
                                                                                
    URINE TESTS                                                                 
                                                                                
    Urinary cadmium (ng/mL) .....................  UDP            1945-1949     
    Urinary cadmium: SI (nmol/L) ................  UDPSI          1950-1955     
    Urinary creatinine (mg/dL) ..................  URP            1956-1960     
    Urinary creatinine: SI (mmol/L) .............  URPSI          1961-1964     
    Urinary albumin (ug/mL) .....................  UBP            1965-1970     
    Urinary iodine (ug/dL) ......................  UIP            1971-1977     
                                                                                
                                                                               
                                                                                
                                                                                
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
    FILENAME=LAB                  VERSION 0.91                       N=29314    
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
           1-5             Sample person identification number                  
      SEQN        29314    00003-53623                                          
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
           6-10            Family sequence number                               
      DMPFSEQ     29314    00001-20076                                          
                                                                                
             11            Examination/interview status             See note    
      DMPSTAT     28857    2     Interviewed, MEC-examined                      
                    457    3     Interviewed, home-examined                     
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             12            Race-ethnicity                           See note    
      DMARETHN    10507    1     Non-Hispanic white                             
                   8756    2     Non-Hispanic black                             
                   8786    3     Mexican-American                               
                   1265    4     Other                                          
                                                                                
             13            Race                                     See note    
      DMARACER    19180    1     White                                          
                   9091    2     Black                                          
                   1037    3     Other                                          
                      6    8     Mexican-American of unknown race               
                                                                                
             14            Ethnicity                                See note    
      DMAETHNR     8786    1     Mexican-American                               
                    788    2     Other Hispanic                                 
                  19740    3     Not Hispanic                                   
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             15            Sex                                                  
      HSSEX       13980    1     Male                                           
                  15334    2     Female                                         
                                                                                
          16-17            Age at interview (Screener)              See note    
      HSAGEIR     29165    01-89                                                
                    149    90    90+                                            
                                                                                
             18            Age at interview-unit (Screener)                     
      HSAGEU      29314    2     Years                                          
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
          19-22            Age in months (Screener)                 See note    
      HSAITMOR    29157    0012-1079                                            
                    147    1080  1080+ months                                   
                     10    9999  Don't know                                     
                                                                                
          23-24            Family size                              See note    
      HSFSIZER     3076    01                                                   
                   5411    02                                                   
                   5006    03                                                   
                   5950    04                                                   
                   4313    05                                                   
                   2312    06                                                   
                   1236    07                                                   
                    821    08                                                   
                    428    09                                                   
                    761    10    10+                                            
                                                                                
          25-26            Household size                           See note    
      HSHSIZER     2478    01                                                   
                   5473    02                                                   
                   5040    03                                                   
                   6041    04                                                   
                   4337    05                                                   
                   2393    06                                                   
                   1301    07                                                   
                    893    08                                                   
                    459    09                                                   
                    899    10    10+                                            
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
          27-29            County FIPS codes for United States      See note    
      DMPCNTYR             counties with populations >= 500,000                 
                  13799    001-439                                              
                  15515    Blank                                                
                                                                                
          30-31            State FIPS codes for United States       See note    
      DMPFIPSR             counties with populations >= 500,000                 
                    359    04                                                   
                   4531    06                                                   
                   1090    12                                                   
                    900    17                                                   
                    242    25                                                   
                    676    26                                                   
                    312    29                                                   
                   1662    36                                                   
                    625    39                                                   
                    724    42                                                   
                    276    44                                                   
                   2044    48                                                   
                    358    53                                                   
                  15515    Blank                                                
                                                                                
             32            Urbanization classification based on     See note    
      DMPMETRO             USDA Rural/Urban continuum codes.                    
                  14615    1     Central counties of metro areas of             
                                 1 million population or more,                  
                                 OR,                                            
                                 Fringe counties of metro areas of              
                                 1 million population or more                   
                  14699    2     All other areas                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                     HOUSEHOLD SCREENER QUESTIONNAIRE (HSQ)                     
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             33            Census region                            See note    
      DMPCREGN     3740    1     Northeast                                      
                   5498    2     Midwest                                        
                  12639    3     South                                          
                   7437    4     West                                           
                                                                                
          34-39            Poverty Income Ratio                     See note    
      DMPPIR         82    00.000  No reported income                           
                  26503    000.02-11.889                                        
                   2729    888888  Blank but applicable                         
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                               SURVEY DESIGN DATA                               
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             40            Phase of NHANES III survey               See note    
      SDPPHASE    14833    1     1988-1991                                      
                  14481    2     1991-1994                                      
                                                                                
             41            Total NHANES III Pseudo-PSU              See note    
      SDPPSU6     14630    1                                                    
                  14684    2                                                    
                                                                                
          42-43            Total NHANES III Pseudo-stratum          See note    
      SDPSTRA6    29314    01-49                                                
                                                                                
             44            Phase 1 Pseudo-PSU                       See note    
      SDPPSU1      7633    1                                                    
                   7200    2                                                    
                  14481    Blank                                                
                                                                                
          45-46            Phase 1 Pseudo-stratum                   See note    
      SDPSTRA1    14833    01-23                                                
                  14481    Blank                                                
                                                                                
             47            Phase 2 Pseudo-PSU                       See note    
      SDPPSU2      7080    1                                                    
                   7401    2                                                    
                  14833    Blank                                                
                                                                                
          48-49            Phase 2 Pseudo-stratum                   See note    
      SDPSTRA2    14481    01-23                                                
                  14833    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                 SAMPLING WEIGHTS - TOTAL NHANES III (1988-94)                  
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
          50-58            Total NHANES III interviewed sample      See note    
      WTPFQX6              final weight                                         
                  29314    000215.53-0132278.9                                  
                                                                                
          59-67            Total NHANES III MEC-examined sample     See note    
      WTPFEX6              final weight                                         
                    457    000000.00                                            
                  28857    000213.45-140778.72                                  
                                                                                
          68-76            Total NHANES III MEC and home-           See note    
      WTPFHX6              examined final weight                                
                  29314    000214.25-139744.91                                  
                                                                                
          77-85            Total NHANES III allergy subsample       See note    
      WTPFALG6             final weight                                         
                     23    000000.00                                            
                  12106    000213.45-288897.91                                  
                  17185    Blank                                                
                                                                                
          86-94            Total NHANES III central nervous         See note    
      WTPFCNS6             system (CNS) subsample final weight                  
                     12    000000.00                                            
                   5662    001316.46-295826.48                                  
                  23640    Blank                                                
                                                                                
          95-103           Total NHANES III morning session         See note    
      WTPFSD6              MEC-examined subsample final weight                  
                    920    000000.00                                            
                   9127    000450.95-292590.96                                  
                  19267    Blank                                                
                                                                                
         104-112           Total NHANES III afternoon/evening       See note    
      WTPFMD6              session MEC-examined subsample final                 
                           weight                                               
                    697    000000.00                                            
                   9497    000495.13-256201.99                                  
                  19120    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                 SAMPLING WEIGHTS - TOTAL NHANES III (1988-94)                  
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         113-121           Total NHANES III morning session MEC     See note    
      WTPFHSD6             and home-examined subsample final                    
                           weight                                               
                    791    000000.00                                            
                   9254    000446.49-291479.91                                  
                  19269    Blank                                                
                                                                                
         122-130           Total NHANES III afternoon/evening       See note    
      WTPFHMD6             session MEC and home-examined                        
                           subsample final weight                               
                    562    000000.00                                            
                   9630    000503.56-256245.36                                  
                  19122    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                SAMPLING WEIGHTS - NHANES III PHASE 1 (1988-91)                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         131-139           Phase 1 interviewed sample final         See note    
      WTPFQX1              weight                                               
                  14833    000461.29-264557.81                                  
                  14481    Blank                                                
                                                                                
         140-148           Phase 1 MEC-examined sample              See note    
      WTPFEX1              final weight                                         
                    229    000000.00                                            
                  14604    000527.01-281557.44                                  
                  14481    Blank                                                
                                                                                
         149-157           Phase 1 MEC and home-examined sample     See note    
      WTPFHX1              final weight                                         
                  14833    000513.14-279489.83                                  
                  14481    Blank                                                
                                                                                
         158-166           Phase 1 allergy subsample final weight   See note    
      WTPFALG1       14    000000.00                                            
                   6097    000821.62-577795.82                                  
                  23203    Blank                                                
                                                                                
         167-175           Phase 1 central nervous system (CNS)     See note    
      WTPFCNS1             subsample final weight                               
                      8    000000.00                                            
                   2751    002699.84-591652.96                                  
                  26555    Blank                                                
                                                                                
         176-184           Phase 1 morning session MEC-examined     See note    
      WTPFSD1              subsample fnal weight                                
                    451    000000.00                                            
                   4462    001111.36-585181.93                                  
                  24401    Blank                                                
                                                                                
         185-193           Phase 1 afternoon/evening session MEC-   See note    
      WTPFMD1              examined subsample final weight                      
                    322    000000.00                                            
                   4726    001104.11-506697.07                                  
                  24266    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                SAMPLING WEIGHTS - NHANES III PHASE 1 (1988-91)                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         194-202           Phase 1 morning session MEC and home-    See note    
      WTPFHSD1             examined subsample final weight                      
                    373    000000.00                                            
                   4540    0001091.8-582959.83                                  
                  24401    Blank                                                
                                                                                
         203-211           Phase 1 afternoon/evening session MEC    See note    
      WTPFHMD1             and home-examined subsample final weight             
                    264    000000.00                                            
                   4784    001085.73-507417.05                                  
                  24266    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                SAMPLING WEIGHTS - NHANES III PHASE 2 (1991-94)                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         212-220           Phase 2 interviewed sample final         See note    
      WTPFQX2              weight                                               
                  14481    000431.06-243267.38                                  
                  14833    Blank                                                
                                                                                
         221-229           Phase 2 MEC-examined sample              See note    
      WTPFEX2              final weight                                         
                    228    000000.00                                            
                  14253    000426.91-262887.56                                  
                  14833    Blank                                                
                                                                                
         230-238           Phase 2 MEC and home-examined sample     See note    
      WTPFHX2              final weight                                         
                  14481    0000428.5-262188.52                                  
                  14833    Blank                                                
                                                                                
         239-247           Phase 2 allergy subsample final weight   See note    
      WTPFALG2        9    000000.00                                            
                   6009    000426.91-552445.57                                  
                  23296    Blank                                                
                                                                                
         248-256           Phase 2 central nervous system (CNS)     See note    
      WTPFCNS2             subsample final weight                               
                      4    000000.00                                            
                   2911    002632.92-518040.33                                  
                  26399    Blank                                                
                                                                                
         257-265           Phase 2 morning session MEC-examined     See note    
      WTPFSD2              subsample fnal weight                                
                    469    000000.00                                            
                   4665    0000901.9-550430.69                                  
                  24180    Blank                                                
                                                                                
         266-274           Phase 2 afternoon/evening session MEC-   See note    
      WTPFMD2              examined subsample final weight                      
                    375    000000.00                                            
                   4771    000990.26-512403.98                                  
                  24168    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                SAMPLING WEIGHTS - NHANES III PHASE 2 (1991-94)                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         275-283           Phase 2 morning session MEC and home-    See note    
      WTPFHSD2             examined subsample final weight                      
                    418    000000.00                                            
                   4714    000892.98-552545.64                                  
                  24182    Blank                                                
                                                                                
         284-292           Phase 2 afternoon/evening session MEC    See note    
      WTPFHMD2             and home-examined subsample final weight             
                    298    000000.00                                            
                   4846    001007.13-512490.71                                  
                  24170    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
       FAY'S BRR REPLICATE INTERVIEW WEIGHTS - TOTAL NHANES III (1988-94)       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         293-301           Replicate 1 final interview weight       See note    
      WTPQRP1     29314    000053.27-148435.02                                  
                                                                                
         302-310           Replicate 2 final interview weight       See note    
      WTPQRP2     29314    000067.13-143746.82                                  
                                                                                
         311-319           Replicate 3 final interview weight       See note    
      WTPQRP3     29314    000047.49-152075.62                                  
                                                                                
         320-328           Replicate 4 final interview weight       See note    
      WTPQRP4     29314    000062.62-137241.93                                  
                                                                                
         329-337           Replicate 5 final interview weight       See note    
      WTPQRP5     29314    000048.42-147700.94                                  
                                                                                
         338-346           Replicate 6 final interview weight       See note    
      WTPQRP6     29314    0000053.1-146803.63                                  
                                                                                
         347-355           Replicate 7 final interview weight       See note    
      WTPQRP7     29314    000058.18-145261.07                                  
                                                                                
         356-364           Replicate 8 final interview weight       See note    
      WTPQRP8     29314    000048.23-161126.44                                  
                                                                                
         365-373           Replicate 9 final interview weight       See note    
      WTPQRP9     29314    000053.27-147301.59                                  
                                                                                
         374-382           Replicate 10 final interview weight      See note    
      WTPQRP10    29314    000073.37-0148125.5                                  
                                                                                
         383-391           Replicate 11 final interview weight      See note    
      WTPQRP11    29314    000058.31-146940.58                                  
                                                                                
         392-400           Replicate 12 final interview weight      See note    
      WTPQRP12    29314    000053.67-153958.72                                  
                                                                                
         401-409           Replicate 13 final interview weight      See note    
      WTPQRP13    29314    000067.93-147395.78                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
       FAY'S BRR REPLICATE INTERVIEW WEIGHTS - TOTAL NHANES III (1988-94)       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         410-418           Replicate 14 final interview weight      See note    
      WTPQRP14    29314    000065.08-138456.05                                  
                                                                                
         419-427           Replicate 15 final interview weight      See note    
      WTPQRP15    29314    000062.35-140673.55                                  
                                                                                
         428-436           Replicate 16 final interview weight      See note    
      WTPQRP16    29314    000040.28-147603.74                                  
                                                                                
         437-445           Replicate 17 final interview weight      See note    
      WTPQRP17    29314    000045.36-154057.83                                  
                                                                                
         446-454           Replicate 18 final interview weight      See note    
      WTPQRP18    29314    000070.42-138896.98                                  
                                                                                
         455-463           Replicate 19 final interview weight      See note    
      WTPQRP19    29314    000050.96-139447.18                                  
                                                                                
         464-472           Replicate 20 final interview weight      See note    
      WTPQRP20    29314    000045.79-156365.73                                  
                                                                                
         473-481           Replicate 21 final interview weight      See note    
      WTPQRP21    29314    000049.79-146241.31                                  
                                                                                
         482-490           Replicate 22 final interview weight      See note    
      WTPQRP22    29314    000047.25-0154848.6                                  
                                                                                
         491-499           Replicate 23 final interview weight      See note    
      WTPQRP23    29314    000037.18-148309.04                                  
                                                                                
         500-508           Replicate 24 final interview weight      See note    
      WTPQRP24    29314    000057.42-141344.14                                  
                                                                                
         509-517           Replicate 25 final interview weight      See note    
      WTPQRP25    29314    000044.13-145105.09                                  
                                                                                
         518-526           Replicate 26 final interview weight      See note    
      WTPQRP26    29314    0000066.1-146773.53                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
       FAY'S BRR REPLICATE INTERVIEW WEIGHTS - TOTAL NHANES III (1988-94)       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         527-535           Replicate 27 final interview weight      See note    
      WTPQRP27    29314    000044.88-142455.25                                  
                                                                                
         536-544           Replicate 28 final interview weight      See note    
      WTPQRP28    29314    000000046-148272.41                                  
                                                                                
         545-553           Replicate 29 final interview weight      See note    
      WTPQRP29    29314    000079.38-153624.57                                  
                                                                                
         554-562           Replicate 30 final interview weight      See note    
      WTPQRP30    29314    000058.09-151140.25                                  
                                                                                
         563-571           Replicate 31 final interview weight      See note    
      WTPQRP31    29314    000051.39-159963.39                                  
                                                                                
         572-580           Replicate 32 final interview weight      See note    
      WTPQRP32    29314    000066.17-132356.37                                  
                                                                                
         581-589           Replicate 33 final interview weight      See note    
      WTPQRP33    29314    0000057.8-136762.37                                  
                                                                                
         590-598           Replicate 34 final interview weight      See note    
      WTPQRP34    29314    000062.28-140628.16                                  
                                                                                
         599-607           Replicate 35 final interview weight      See note    
      WTPQRP35    29314    000063.73-154630.49                                  
                                                                                
         608-616           Replicate 36 final interview weight      See note    
      WTPQRP36    29314    000067.29-153648.69                                  
                                                                                
         617-625           Replicate 37 final interview weight      See note    
      WTPQRP37    29314    000043.47-135065.98                                  
                                                                                
         626-634           Replicate 38 final interview weight      See note    
      WTPQRP38    29314    000054.55-152122.87                                  
                                                                                
         635-643           Replicate 39 final interview weight      See note    
      WTPQRP39    29314    000050.55-152941.69                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
       FAY'S BRR REPLICATE INTERVIEW WEIGHTS - TOTAL NHANES III (1988-94)       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         644-652           Replicate 40 final interview weight      See note    
      WTPQRP40    29314    000054.45-146815.92                                  
                                                                                
         653-661           Replicate 41 final interview weight      See note    
      WTPQRP41    29314    000059.62-141514.78                                  
                                                                                
         662-670           Replicate 42 final interview weight      See note    
      WTPQRP42    29314    000068.97-0140162.4                                  
                                                                                
         671-679           Replicate 43 final interview weight      See note    
      WTPQRP43    29314    000044.04-150981.83                                  
                                                                                
         680-688           Replicate 44 final interview weight      See note    
      WTPQRP44    29314    000040.36-144080.03                                  
                                                                                
         689-697           Replicate 45 final interview weight      See note    
      WTPQRP45    29314    000054.74-0142465.6                                  
                                                                                
         698-706           Replicate 46 final interview weight      See note    
      WTPQRP46    29314    000078.43-137838.21                                  
                                                                                
         707-715           Replicate 47 final interview weight      See note    
      WTPQRP47    29314    000052.71-145055.34                                  
                                                                                
         716-724           Replicate 48 final interview weight      See note    
      WTPQRP48    29314    000046.91-148787.77                                  
                                                                                
         725-733           Replicate 49 final interview weight      See note    
      WTPQRP49    29314    0000072.4-148375.43                                  
                                                                                
         734-742           Replicate 50 final interview weight      See note    
      WTPQRP50    29314    000070.53-159394.39                                  
                                                                                
         743-751           Replicate 51 final interview weight      See note    
      WTPQRP51    29314    000054.73-0144964.3                                  
                                                                                
         752-760           Replicate 52 final interview weight      See note    
      WTPQRP52    29314    000072.04-149087.24                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
      FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)      
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         761-769           Replicate 1 final exam weight            See note    
      WTPXRP1       457    000000.00                                            
                  28857    000054.73-164698.81                                  
                                                                                
         770-778           Replicate 2 final exam weight            See note    
      WTPXRP2       457    000000.00                                            
                  28857    0000067.3-164887.24                                  
                                                                                
         779-787           Replicate 3 final exam weight            See note    
      WTPXRP3       457    000000.00                                            
                  28857    0000048.2-0161201.8                                  
                                                                                
         788-796           Replicate 4 final exam weight            See note    
      WTPXRP4       457    000000.00                                            
                  28857    000067.24-149561.18                                  
                                                                                
         797-805           Replicate 5 final exam weight            See note    
      WTPXRP5       457    000000.00                                            
                  28857    000055.97-146312.81                                  
                                                                                
         806-814           Replicate 6 final exam weight            See note    
      WTPXRP6       457    000000.00                                            
                  28857    000051.48-156250.53                                  
                                                                                
         815-823           Replicate 7 final exam weight            See note    
      WTPXRP7       457    000000.00                                            
                  28857    000060.06-0157694.3                                  
                                                                                
         824-832           Replicate 8 final exam weight            See note    
      WTPXRP8       457    000000.00                                            
                  28857    0000053.1-169111.97                                  
                                                                                
         833-841           Replicate 9 final exam weight            See note    
      WTPXRP9       457    000000.00                                            
                  28857    000052.31-156939.22                                  
                                                                                
         842-850           Replicate 10 final exam weight           See note    
      WTPXRP10      457    000000.00                                            
                  28857    000072.13-0165805.2                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
      FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)      
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         851-859           Replicate 11 final exam weight           See note    
      WTPXRP11      457    000000.00                                            
                  28857    000053.54-154918.93                                  
                                                                                
         860-868           Replicate 12 final exam weight           See note    
      WTPXRP12      457    000000.00                                            
                  28857    000055.35-164023.88                                  
                                                                                
         869-877           Replicate 13 final exam weight           See note    
      WTPXRP13      457    000000.00                                            
                  28857    0000067.9-147355.32                                  
                                                                                
         878-886           Replicate 14 final exam weight           See note    
      WTPXRP14      457    000000.00                                            
                  28857    000067.04-154034.72                                  
                                                                                
         887-895           Replicate 15 final exam weight           See note    
      WTPXRP15      457    000000.00                                            
                  28857    000062.21-156384.73                                  
                                                                                
         896-904           Replicate 16 final exam weight           See note    
      WTPXRP16      457    000000.00                                            
                  28857    000000040-157994.12                                  
                                                                                
         905-913           Replicate 17 final exam weight           See note    
      WTPXRP17      457    000000.00                                            
                  28857    000048.34-160889.46                                  
                                                                                
         914-922           Replicate 18 final exam weight           See note    
      WTPXRP18      457    000000.00                                            
                  28857    0000075.2-153937.93                                  
                                                                                
         923-931           Replicate 19 final exam weight           See note    
      WTPXRP19      457    000000.00                                            
                  28857    000056.83-149483.14                                  
                                                                                
         932-940           Replicate 20 final exam weight           See note    
      WTPXRP20      457    000000.00                                            
                  28857    0000045.1-165457.71                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
      FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)      
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         941-949           Replicate 21 final exam weight           See note    
      WTPXRP21      457    000000.00                                            
                  28857    000055.15-152305.97                                  
                                                                                
         950-958           Replicate 22 final exam weight           See note    
      WTPXRP22      457    000000.00                                            
                  28857    000045.53-159746.13                                  
                                                                                
         959-967           Replicate 23 final exam weight           See note    
      WTPXRP23      457    000000.00                                            
                  28857    000037.51-158016.62                                  
                                                                                
         968-976           Replicate 24 final exam weight           See note    
      WTPXRP24      457    000000.00                                            
                  28857    000054.91-153043.54                                  
                                                                                
         977-985           Replicate 25 final exam weight           See note    
      WTPXRP25      457    000000.00                                            
                  28857    000043.77-155179.51                                  
                                                                                
         986-994           Replicate 26 final exam weight           See note    
      WTPXRP26      457    000000.00                                            
                  28857    000071.23-168273.22                                  
                                                                                
         995-1003          Replicate 27 final exam weight           See note    
      WTPXRP27      457    000000.00                                            
                  28857    000043.82-153212.25                                  
                                                                                
        1004-1012          Replicate 28 final exam weight           See note    
      WTPXRP28      457    000000.00                                            
                  28857    000045.61-147920.01                                  
                                                                                
        1013-1021          Replicate 29 final exam weight           See note    
      WTPXRP29      457    000000.00                                            
                  28857    000083.17-159279.49                                  
                                                                                
        1022-1030          Replicate 30 final exam weight           See note    
      WTPXRP30      457    000000.00                                            
                  28857    000059.05-162389.35                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
      FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)      
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1031-1039          Replicate 31 final exam weight           See note    
      WTPXRP31      457    000000.00                                            
                  28857    000052.61-163894.16                                  
                                                                                
        1040-1048          Replicate 32 final exam weight           See note    
      WTPXRP32      457    000000.00                                            
                  28857    000067.05-0149876.8                                  
                                                                                
        1049-1057          Replicate 33 final exam weight           See note    
      WTPXRP33      457    000000.00                                            
                  28857    000055.58-153417.47                                  
                                                                                
        1058-1066          Replicate 34 final exam weight           See note    
      WTPXRP34      457    000000.00                                            
                  28857    000063.45-156981.83                                  
                                                                                
        1067-1075          Replicate 35 final exam weight           See note    
      WTPXRP35      457    000000.00                                            
                  28857    000064.47-157897.09                                  
                                                                                
        1076-1084          Replicate 36 final exam weight           See note    
      WTPXRP36      457    000000.00                                            
                  28857    000067.68-171875.06                                  
                                                                                
        1085-1093          Replicate 37 final exam weight           See note    
      WTPXRP37      457    000000.00                                            
                  28857    000045.36-153137.39                                  
                                                                                
        1094-1102          Replicate 38 final exam weight           See note    
      WTPXRP38      457    000000.00                                            
                  28857    000055.94-159979.02                                  
                                                                                
        1103-1111          Replicate 39 final exam weight           See note    
      WTPXRP39      457    000000.00                                            
                  28857    000057.47-151920.72                                  
                                                                                
        1112-1120          Replicate 40 final exam weight           See note    
      WTPXRP40      457    000000.00                                            
                  28857    000057.86-157191.41                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
      FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)      
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1121-1129          Replicate 41 final exam weight           See note    
      WTPXRP41      457    000000.00                                            
                  28857    0000061.4-000146023                                  
                                                                                
        1130-1138          Replicate 42 final exam weight           See note    
      WTPXRP42      457    000000.00                                            
                  28857    000069.57-154624.02                                  
                                                                                
        1139-1147          Replicate 43 final exam weight           See note    
      WTPXRP43      457    000000.00                                            
                  28857    000044.35-159439.04                                  
                                                                                
        1148-1156          Replicate 44 final exam weight           See note    
      WTPXRP44      457    000000.00                                            
                  28857    000044.16-155951.73                                  
                                                                                
        1157-1165          Replicate 45 final exam weight           See note    
      WTPXRP45      457    000000.00                                            
                  28857    000059.87-147941.67                                  
                                                                                
        1166-1174          Replicate 46 final exam weight           See note    
      WTPXRP46      457    000000.00                                            
                  28857    000074.92-150980.02                                  
                                                                                
        1175-1183          Replicate 47 final exam weight           See note    
      WTPXRP47      457    000000.00                                            
                  28857    000050.64-151763.92                                  
                                                                                
        1184-1192          Replicate 48 final exam weight           See note    
      WTPXRP48      457    000000.00                                            
                  28857    0000045.8-156115.62                                  
                                                                                
        1193-1201          Replicate 49 final exam weight           See note    
      WTPXRP49      457    000000.00                                            
                  28857    000082.17-159609.54                                  
                                                                                
        1202-1210          Replicate 50 final exam weight           See note    
      WTPXRP50      457    000000.00                                            
                  28857    000071.97-168153.71                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
      FAY'S BRR REPLICATE EXAMINATION WEIGHTS - TOTAL NHANES III (1988-94)      
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1211-1219          Replicate 51 final exam weight           See note    
      WTPXRP51      457    000000.00                                            
                  28857    000054.04-158632.23                                  
                                                                                
        1220-1228          Replicate 52 final exam weight           See note    
      WTPXRP52      457    000000.00                                            
                  28857    000073.26-158493.21                                  
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                      HOUSEHOLD YOUTH QUESTIONNAIRE (HYQ)                       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1229-1232          Age in months at household youth         See note    
      HYAITMO              interview                                            
                  11138    0012-0204                                            
                     14    8888  Blank but applicable                           
                  18162    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                                MEC EXAMINATION                                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1233          Language used by sample person in MEC    See note    
      MXPLANG     23936    1     English                                        
                   3906    2     Spanish                                        
                      3    3     Other                                          
                   1469    Blank                                                
                                                                                
             1234          Examination session for MEC              See note    
      MXPSESSR             examinees                                            
                  13643    1     Morning                                        
                   9419    2     Afternoon                                      
                   5795    3     Evening                                        
                    457    Blank                                                
                                                                                
             1235          Day of week of MEC exam                              
      MXPTIDW      2884    1     Sunday                                         
                   2618    2     Monday                                         
                   2503    3     Tuesday                                        
                   2914    4     Wednesday                                      
                   5466    5     Thursday                                       
                   5082    6     Friday                                         
                   7390    7     Saturday                                       
                    457    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                                MEC EXAMINATION                                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1236-1239          Age in months at MEC exam                See note    
      MXPAXTMR    28751    0012-1079                                            
                    106    1080  1080+ months                                   
                    457    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                DEMOGRAPHIC DATA                                
    ------------------------------------------------------------------------    
                                HOME EXAMINATION                                
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1240          Day of week of home exam                             
      HXPTIDW        22    1     Sunday                                         
                    111    2     Monday                                         
                      6    3     Tuesday                                        
                     16    4     Wednesday                                      
                    123    5     Thursday                                       
                    119    6     Friday                                         
                     60    7     Saturday                                       
                  28857    Blank                                                
                                                                                
        1241-1244          Age in months at home exam               See note    
      HXPAXTMR      410    0252-1079                                            
                     47    1080  1080+ months                                   
                  28857    Blank                                                
                                                                                
             1245          Examination session for home             See note    
      HXPSESSR             examinees                                            
                    203    1     Morning                                        
                    212    2     Afternoon                                      
                     38    3     Evening                                        
                      4    8     Blank but applicable                           
                  28857    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                       PHLEBOTOMY SCREENING QUESTIONNAIRE                       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1246          Language                                 See note    
      PHPLANG     25009    1     English                                        
                   2736    2     Spanish                                        
                   1569    8     Blank but applicable                           
                                                                                
             1247          Do you have hemophilia? This is a        See note    
      PHPHEMO              hereditary blood-clotting disorder                   
                      9    1     Yes, subsequent fields blank                   
                  27736    2     No                                             
                   1569    8     Blank but applicable                           
                                                                                
             1248          Within the past four weeks               See note    
      PHPCHM2              have you received any cancer                         
                           chemotherapy treatment?                              
                     19    1     Yes, subsequent fields blank                   
                  27717    2     No                                             
                   1569    8     Blank but applicable                           
                      9    Blank                                                
                                                                                
             1249          Are you currently taking insulin?        See note    
      PHPINSU       418    1     Yes                                            
                  27298    2     No                                             
                   1570    8     Blank but applicable                           
                     28    Blank                                                
                                                                                
        1250-1254          Including your last meal and any                     
      PHPSNTI              snacks, at what time did you last                    
                           have anything at all to eat?                         
                  27701    00:00-23:59                                          
                   1585    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
             1255          Day participant last ate                             
      PHPSNDA     12604    1     Yesterday                                      
                  15081    2     Today                                          
                     16    3     Before yesterday                               
                   1585    8     Blank but applicable                           
                     28    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                       PHLEBOTOMY SCREENING QUESTIONNAIRE                       
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1256          Have you had anything to drink,                      
      PHPDRIN              other than water, after the time                     
                           you last ate?                                        
                   3947    1     Yes                                            
                  23754    2     No, subsequent drink fields blank              
                   1585    8     Blank but applicable                           
                     28    Blank                                                
                                                                                
        1257-1261          At what time did you last have                       
      PHPDRTI              anything at all to drink other than                  
                           water?                                               
                   3947    00:00-23:57                                          
                   1585    88888 Blank but applicable                           
                  23782    Blank                                                
                                                                                
             1262          Day participant last drank                           
      PHPDRDA      1094    1     Yesterday                                      
                   2853    2     Today                                          
                   1585    8     Blank but applicable                           
                  23782    Blank                                                
                                                                                
        1263-1267          Computed number of hours since last      See note    
      PHPFAST              ate or drank                                         
                  27700    00000-39.13                                          
                   1586    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1268-1272          Time of venipuncture                     See note    
      PHPBEST     27703    07:32-22:02                                          
                   1583    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1273-1277          White blood cell count                   See note    
      WCP         26372    01.75-71.35                                          
                   2914    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1278-1282          White blood cell count: SI                           
      WCPSI       26372    01.75-71.35                                          
                   2914    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1283-1287          Lymphocyte percent (Coulter)                         
      LMPPCNT     26370    003.2-083.2                                          
                   2916    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1288-1292          Mononuclear percent (Coulter)                        
      MOPPCNT     25924    00000-37.55                                          
                   3362    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1293-1297          Granulocyte percent (Coulter)                        
      GRPPCNT     25925    010.9-093.9                                          
                   3361    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1298-1302          Lymphocyte number (Coulter)              See note    
      LMP         26370    00.35-048.1                                          
                   2916    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1303-1306          Mononuclear number (Coulter)             See note    
      MOP         25924    0000-06.4                                            
                   3362    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1307-1311          Granulocyte number (Coulter)             See note    
      GRP         25925    000.2-023.4                                          
                   3361    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1312-1315          Red blood cell count                     See note    
      RCP         26370    1.69-6.84                                            
                   2916    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1316-1319          Red blood cell count: SI                             
      RCPSI       26370    1.69-6.84                                            
                   2916    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1320-1324          Hemoglobin (g/dL)                        See note    
      HGP         26372    04.95-019.6                                          
                   2914    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1325-1329          Hemoglobin: SI (g/L)                                 
      HGPSI       26372    049.5-00196                                          
                   2914    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1330-1334          Hematocrit (%)                           See note    
      HTP         26370    016.6-057.6                                          
                   2916    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1335-1339          Hematocrit: SI (L/L=1)                               
      HTPSI       26370    0.166-0.576                                          
                   2916    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1340-1344          Mean cell volume: SI (fL)                See note    
      MVPSI       26371    051.2-122.8                                          
                   2915    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1345-1349          Mean cell hemoglobin: SI (pg)            See note    
      MCPSI       26369    013.6-053.6                                          
                   2917    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1350-1354          Mean cell hemoglobin concentration       See note    
      MHP                  (g/dL)                                               
                  26369    25.95-52.35                                          
                   2917    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1355-1359          Mean cell hemoglobin                                 
      MHPSI                concentration: SI (g/L)                              
                  26369    259.5-523.5                                          
                   2917    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1360-1364          Red cell distribution width (%)                      
      RWP         26372    007.8-31.95                                          
                   2914    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1365-1370          Red cell distribution width: SI                      
      RWPSI                (fraction)                                           
                  26372    00.078-0.3195                                        
                   2914    888888  Blank but applicable                         
                     28    Blank                                                
                                                                                
        1371-1375          Platelet count                           See note    
      PLP         26367    014.5-00981                                          
                   2919    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1376-1380          Platelet count: SI                                   
      PLPSI       26367    014.5-00981                                          
                   2919    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1381-1385          Platelet distribution width (%)                      
      DWP         26200    005.8-24.65                                          
                   3086    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1386-1390          Mean platelet volume: SI (fL)                        
      PVPSI       26373    00003-00043                                          
                   2913    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1391-1393          Segmented neutrophils (percent of 100    See note    
      GRPDIF               cells)                                               
                   8150    007-090                                              
                   2276    888   Blank but applicable                           
                  18888    Blank                                                
                                                                                
        1394-1396          Lymphocytes (percent of 100 cells)       See note    
      LMPDIF       8150    004-088                                              
                   2276    888   Blank but applicable                           
                  18888    Blank                                                
                                                                                
        1397-1398          Monocytes (percent of 100 cells)         See note    
      MOPDIF       8150    00-23                                                
                   2276    88    Blank but applicable                           
                  18888    Blank                                                
                                                                                
        1399-1400          Eosinophils (percent of 100 cells)       See note    
      EOP          8150    00-51                                                
                   2276    88    Blank but applicable                           
                  18888    Blank                                                
                                                                                
        1401-1402          Basophils (percent of 100 cells)         See note    
      BOP          8150    00-22                                                
                   2276    88    Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1403          Blasts (percent of 100 cells)            See note    
      BLP          8150    0                                                    
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1404          Promyelocytes (percent of 100 cells)     See note    
      PRP          8150    0                                                    
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1405          Metamyelocytes (percent of 100 cells)    See note    
      MEP          8150    0-2                                                  
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1406          Myelocytes (percent of 100 cells)        See note    
      MLP          8150    0-1                                                  
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
        1407-1408          Bands (percent of 100 cells)             See note    
      BAP          8150    00-22                                                
                   2276    88    Blank but applicable                           
                  18888    Blank                                                
                                                                                
        1409-1410          Atypical lymphocytes (percent of 100     See note    
      LAP                  cells)                                               
                   8150    00-28                                                
                   2276    88    Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1411          Anisocytosis (variation of cell size)    See note    
      ANP          6120    0     Normal                                         
                   2030    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1412          Basophilic stippling                     See note    
      BSP          8047    0     Normal                                         
                    103    1-3  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1413          Hypochromia (stain intensity of cell)    See note    
      HZP          6891    0     Normal                                         
                   1259    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1414          Poikilocytosis (cell shape variation)    See note    
      PKP          7067    0     Normal                                         
                   1083    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1415          Polychromatophilia (bluish color of cell)See note    
      POP          7231    0     Normal                                         
                    919    1-3  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1416          Macrocytosis (large cell prevalence)     See note    
      MRP          7569    0     Normal                                         
                    581    1-3  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1417          Microcytosis (small cell prevalence)     See note    
      MIP          6873    0     Normal                                         
                   1277    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1418          Sickle cells                             See note    
      SIP          8135    0     Normal                                         
                     15    1-3  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1419          Spherocytosis                            See note    
      SHP          7479    0     Normal                                         
                    671    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1420          Target cells                             See note    
      TTP          7620    0     Normal                                         
                    530    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                   HEMATOLOGY                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1421          Toxic granulation                        See note    
      TXP          7839    0     Normal                                         
                    311    1-4  Gradation to abnormal                           
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
             1422          Vacuolated cells                         See note    
      VUP          8150    0     Normal                                         
                   2276    8     Blank but applicable                           
                  18888    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1423-1426          Lead (ug/dL)                                         
      PBP          2342    00.7  Below level of detection                       
                  24476    0001-71.8                                            
                   2468    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1427-1431          Lead: SI (umol/L)                                    
      PBPSI        2342    0.034 Below level of detection                       
                  24476    0.048-3.465                                          
                   2468    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1432-1435          Protoporphyrin (ug/dL RBC)                           
      EPP         26706    0003-1008                                            
                   2580    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1436-1440          Protoporphyrin: SI (umol/L RBC)                      
      EPPSI       26706    00.05-17.94                                          
                   2580    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1441-1443          Serum iron (ug/dL)                       See note    
      FEP         26479    004-338                                              
                   2807    888   Blank but applicable                           
                     28    Blank                                                
                                                                                
        1444-1448          Serum iron: SI (umol/L)                              
      FEPSI       26479    00.72-60.54                                          
                   2807    88888 Blank but applicable                           
                     28    Blank                                                
                                                                                
        1449-1452          Serum TIBC (ug/dL)                                   
      TIP         25802    0069-0866                                            
                   3484    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1453-1458          Serum TIBC: SI (umol/L)                              
      TIPSI       25802    012.36-0155.1                                        
                   3484    888888  Blank but applicable                         
                     28    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1459-1462          Serum transferrin saturation (%)         See note    
      PXP         25770    00.8-98.5                                            
                   3516    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1463-1466          Serum ferritin (ng/mL)                               
      FRP            13    0002  Below level of detection                       
                  26380    0003-3059                                            
                   2893    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1467-1470          Serum ferritin: SI (ug/L)                            
      FRPSI          13    0002  Below level of detection                       
                  26380    0003-3059                                            
                   2893    8888  Blank but applicable                           
                     28    Blank                                                
                                                                                
        1471-1475          Serum folate (ng/mL)                     See note    
      FOP             1    000.1 Below level of detection                       
                  23704    000.4-00199                                          
                   1937    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1476-1480          Serum folate: SI (nmol/L)                            
      FOPSI           1    000.2 Below level of detection                       
                  23704    000.9-450.9                                          
                   1937    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1481-1484          RBC folate (ng/mL)                       See note    
      RBP         23404    0007-1755                                            
                   2238    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1485-1490          RBC folate: SI (nmol/L)                              
      RBPSI       23404    0015.9-3976.8                                        
                   2238    888888  Blank but applicable                         
                   3672    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1491-1496          Serum vitamin B12 (pg/mL)                            
      VBP         12024    000033-099999                                        
                    722    888888  Blank but applicable                         
                  16568    Blank                                                
                                                                                
        1497-1504          Serum vitamin B12: SI (pmol/L)                       
      VBPSI                                                                     
                  12024    00024.35-73779.26                                    
                    722    88888888  Blank but applicable                       
                  16568    Blank                                                
                                                                                
        1505-1508          Serum vitamin C (mg/dL)                  See note    
      VCP         20636    0000-4.72                                            
                   2408    8888  Blank but applicable                           
                   6270    Blank                                                
                                                                                
        1509-1514          Serum vitamin C: SI (mmol/L)                         
      VCPSI       20636    000000-000268                                        
                   2408    888888  Blank but applicable                         
                   6270    Blank                                                
                                                                                
        1515-1518          Serum normalized calcium: SI (mmol/L)    See note    
      ICPSI       16737    0.81-1.95                                            
                   3022    8888  Blank but applicable                           
                   9555    Blank                                                
                                                                                
        1519-1522          Serum total calcium: SI (mmol/L)                     
      CAPSI           4    1.06  Below level of detection                       
                  18490    1.57-3.29                                            
                   1265    8888  Blank but applicable                           
                   9555    Blank                                                
                                                                                
        1523-1526          Serum selenium (ng/mL)                   See note    
      SEP         18597    0039-0622                                            
                   1619    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1527-1530          Serum selenium: SI (nmol/L)                          
      SEPSI       18597    00.5-07.9                                            
                   1619    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1531-1533          Serum vitamin A (ug/dL)                              
      VAP         23274    002-259                                              
                   2368    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1534-1537          Serum vitamin A: SI (umol/L)                         
      VAPSI       23274    0.07-9.04                                            
                   2368    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1538-1542          Serum vitamin E (ug/dL)                  See note    
      VEP         23274    00028-09999                                          
                   2368    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1543-1548          Serum vitamin E: SI (umol/L)                         
      VEPSI       23274    000.65-232.18                                        
                   2368    888888  Blank but applicable                         
                   3672    Blank                                                
                                                                                
        1549-1551          Serum alpha carotene (ug/dL)                         
      ACP         23274    000-202                                              
                   2368    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1552-1555          Serum alpha carotene: SI (umol/L)                    
      ACPSI       23274    0000-3.76                                            
                   2368    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1556-1559          Serum beta carotene (ug/dL)              See note    
      BCP             5    0000  Below level of detection                       
                  23269    0001-0674                                            
                   2368    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1560-1564          Serum beta carotene: SI (umol/L)                     
      BCPSI           5    00.00 Below level of detection                       
                  23269    00.02-12.56                                          
                   2368    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1565-1567          Serum beta cryptoxanthin (ug/dL)                     
      BXP         23272    000-144                                              
                   2370    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1568-1571          Serum beta cryptoxanthin: SI (umol/L)                
      BXPSI       23272    0000-02.6                                            
                   2370    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1572-1574          Serum lutein/zeaxanthin (ug/dL)          See note    
      LUP             3    000   Below level of detection                       
                  23271    001-478                                              
                   2368    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1575-1578          Serum lutein/zeaxanthin: SI (umol/L)                 
      LUPSI           3    0.00  Below level of detection                       
                  23271    0.02-08.4                                            
                   2368    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1579-1581          Serum lycopene (ug/dL)                   See note    
      LYP            25    000   Below level of detection                       
                  23249    001-124                                              
                   2368    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1582-1585          Serum lycopene: SI (umol/L)                          
      LYPSI          25    0.00  Below level of detection                       
                  23249    0.02-2.31                                            
                   2368    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1586-1588          Serum sum retinyl esters (ug/dL)                     
      REP         23274    000-269                                              
                   2368    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1589-1592          Serum sum retinyl esters: SI (umol/L)                
      REPSI       23274    0000-9.39                                            
                   2368    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1593-1597          Serum cotinine (ng/mL)                   See note    
      COP           994    0.035 Below level of detection                       
                   9648    00.05-01470                                          
                   2025    88888 Blank but applicable                           
                  16647    Blank                                                
                                                                                
        1598-1600          Serum cholesterol (mg/dL)                            
      TCP         23561    059-702                                              
                   2081    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1601-1605          Serum cholesterol: SI (mmol/L)                       
      TCPSI       23561    01.53-18.15                                          
                   2081    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1606-1609          Serum triglycerides (mg/dL)              See note    
      TGP         23515    0013-3616                                            
                   2127    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1610-1614          Serum triglycerides: SI (mmol/L)                     
      TGPSI       23515    00.15-40.82                                          
                   2127    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1615-1617          Serum LDL cholesterol (mg/dL)            See note    
      LCP          7891    020-380                                              
                   2254    888   Blank but applicable                           
                  19169    Blank                                                
                                                                                
        1618-1621          Serum LDL cholesterol: SI (mmol/L)                   
      LCPSI        7891    0.52-9.83                                            
                   2254    8888  Blank but applicable                           
                  19169    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1622-1624          Serum HDL cholesterol (mg/dL)                        
      HDP         23409    008-196                                              
                   2233    888   Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1625-1628          Serum HDL cholesterol: SI (mmol/L)                   
      HDPSI       23409    0.21-5.07                                            
                   2233    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1629-1631          Serum apolipoprotein AI (mg/dL)          See note    
      AAP         11432    059-300                                              
                   1464    888   Blank but applicable                           
                  16418    Blank                                                
                                                                                
        1632-1635          Serum apolipoprotein AI: SI (g/L)                    
      AAPSI       11432    0.59-0003                                            
                   1464    8888  Blank but applicable                           
                  16418    Blank                                                
                                                                                
        1636-1638          Serum apolipoprotein B (mg/dL)           See note    
      ABP         11483    040-260                                              
                   1413    888   Blank but applicable                           
                  16418    Blank                                                
                                                                                
        1639-1642          Serum apolipoprotein B: SI (g/L)                     
      ABPSI       11483    00.4-02.6                                            
                   1413    8888  Blank but applicable                           
                  16418    Blank                                                
                                                                                
        1643-1645          Serum lipoprotein (a) (mg/dL)                        
      LPP         12018    000-276                                              
                    728    888   Blank but applicable                           
                  16568    Blank                                                
                                                                                
        1646-1649          Serum lipoprotein (a): SI (g/L)                      
      LPPSI       12018    0000-2.76                                            
                    728    8888  Blank but applicable                           
                  16568    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                           GENERAL BIOCHEMISTRY TESTS                           
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1650-1654          Serum follicle stimulating hormone: SI               
      FHPSI                (IU/L)                                               
                      6    000.1 Below level of detection                       
                   3116    000.2-00170                                          
                    253    88888 Blank but applicable                           
                  25939    Blank                                                
                                                                                
        1655-1658          Serum luteinizing hormone: SI (IU/L)                 
      LHPSI           2    00.1  Below level of detection                       
                   3118    00.2-67.1                                            
                    255    8888  Blank but applicable                           
                  25939    Blank                                                
                                                                                
        1659-1662          Plasma fibrinogen (mg/dL)                            
      FBP          9350    0019-0957                                            
                    810    8888  Blank but applicable                           
                  19154    Blank                                                
                                                                                
        1663-1666          Plasma fibrinogen: SI (g/L)                          
      FBPSI        9350    0.19-9.57                                            
                    810    8888  Blank but applicable                           
                  19154    Blank                                                
                                                                                
        1667-1671          Serum C-reactive protein (mg/dL)                     
      CRP         16218    00.21 Below level of detection                       
                   6249    000.3-025.2                                          
                   3175    88888 Blank but applicable                           
                   3672    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                 ANTIBODY TESTS                                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1672-1677          Serum tetanus antibody (U/mL)                        
      TEP         19336    000000-074.67                                        
                   5849    888888  Blank but applicable                         
                   4129    Blank                                                
                                                                                
             1678          Serum hepatitis A antibody                           
      AHP                  (anti-HAV)                                           
                   9872    1     Positive                                       
                  11376    2     Negative                                       
                     12    3     Borderline                                     
                   1784    8     Blank but applicable                           
                   6270    Blank                                                
                                                                                
             1679          Serum hepatitis B core antibody          See note    
      HBP                  (anti-HBc)                                           
                   1368    1     Positive                                       
                  19886    2     Negative                                       
                     11    3     Borderline                                     
                   1779    8     Blank but applicable                           
                   6270    Blank                                                
                                                                                
        1680-1681          Serum hepatitis B surface antibody       See note    
      SSP                  (anti-HBs)                                           
                    593    01    Positive                                       
                    160    02    Negative                                       
                    108    03    Borderline                                     
                    340    11    > 10 mIU                                       
                    155    22    < 10 mIU                                       
                   1856    88    Blank but applicable                           
                  26102    Blank                                                
                                                                                
             1682          Serum hepatitis B surface antigen        See note    
      SAP                  (HBsAg)                                              
                     82    1     Positive                                       
                   1292    2     Negative                                       
                      1    3     Borderline                                     
                   1837    8     Blank but applicable                           
                  26102    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                 ANTIBODY TESTS                                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
             1683          Serum hepatitis C antibody                           
      HCP                  (anti-HCV)                                           
                    402    1     Positive                                       
                  20796    2     Negative                                       
                     43    4     Indeterminate                                  
                   1803    8     Blank but applicable                           
                   6270    Blank                                                
                                                                                
             1684          Serum hepatitis D antibody               See note    
      DHP                  (anti-HDV)                                           
                      3    1     Positive                                       
                     76    2     Negative                                       
                      4    8     Blank but applicable                           
                  29231    Blank                                                
                                                                                
             1685          Serum herpes I antibody                              
      H1P          9843    1     Positive                                       
                   3205    2     Negative                                       
                     50    3     Indeterminate                                  
                   3184    8     Blank but applicable                           
                  13032    Blank                                                
                                                                                
             1686          Serum herpes II antibody                             
      H2P          3532    1     Positive                                       
                   9476    2     Negative                                       
                     86    3     Indeterminate                                  
                   3188    8     Blank but applicable                           
                  13032    Blank                                                
                                                                                
        1687-1691          Serum rubella antibody                   See note    
      RUP         21288    00000-72.91                                          
                   2213    88888 Blank but applicable                           
                   5813    Blank                                                
                                                                                
        1692-1695          Serum rubella antibody (IU)              See note    
      RUPUNIT     21288    0000-1224                                            
                   2213    8888  Blank but applicable                           
                   5813    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                 ANTIBODY TESTS                                 
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1696-1700          Serum varicella antibody                 See note    
      VRP         21288    00000-29.64                                          
                   2213    88888 Blank but applicable                           
                   5813    Blank                                                
                                                                                
        1701-1703          Serum toxoplasmosis antibody             See note    
      TOP         17658    000-240                                              
                   2558    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1704-1708          Serum rheumatoid factor antibody                     
      RFP          5271    00000-40960                                          
                    437    88888 Blank but applicable                           
                  23606    Blank                                                
                                                                                
        1709-1713          Serum latex antibody (IU/mL)             See note    
      L1P          5524    00000-47.48                                          
                  23790    Blank                                                
                                                                                
             1714          Serum helicobacter pylori antibody       See note    
      HPP           848    1     Positive                                       
                   1733    2     Negative                                       
                    125    3     Equivocal                                      
                  26608    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                              BIOCHEMISTRY PROFILE                              
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1715-1719          Serum sodium: SI (mmol/L)                            
      NAPSI       18723    123.4-177.5                                          
                   1493    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1720-1723          Serum potassium: SI (mmol/L)                         
      SKPSI       18723    2.51-6.94                                            
                   1493    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1724-1728          Serum chloride: SI (mmol/L)                          
      CLPSI       18723    076.2-121.6                                          
                   1493    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1729-1730          Serum bicarbonate: SI (mmol/L)                       
      C3PSI       18721    04-53                                                
                   1495    88    Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1731-1734          Serum total calcium (mg/dL)                          
      SCP         18722    06.6-15.4                                            
                   1494    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1735-1739          Serum total calcium: SI (mmol/L)                     
      SCPSI       18722    01.65-03.85                                          
                   1494    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1740-1743          Serum phosphorus (mg/dL)                             
      PSP         18723    01.5-10.5                                            
                   1493    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1744-1748          Serum phosphorus: SI (mmol/L)                        
      PSPSI       18723    0.484-03.39                                          
                   1493    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                              BIOCHEMISTRY PROFILE                              
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1749-1752          Serum uric acid (mg/dL)                              
      UAP         18723    00.2-15.9                                            
                   1493    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1753-1757          Serum uric acid: SI (umol/L)                         
      UAPSI       18723    011.9-945.7                                          
                   1493    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1758-1760          Serum glucose (mg/dL)                    See note    
      SGP         18719    037-571                                              
                   1497    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1761-1765          Serum glucose: SI (mmol/L)                           
      SGPSI       18719    02.05-031.7                                          
                   1497    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1766-1768          Serum blood urea nitrogen (mg/dL)                    
      BUP         18723    002-104                                              
                   1493    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1769-1773          Serum blood urea nitrogen: SI (mmol/L)               
      BUPSI       18723    00.71-37.13                                          
                   1493    88888 Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1774-1777          Serum total bilirubin (mg/dL)                        
      TBP         18723    0000-10.4                                            
                   1493    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1778-1783          Serum total bilirubin: SI (umol/L)                   
      TBPSI       18723    000000-177.84                                        
                   1493    888888  Blank but applicable                         
                   9098    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                              BIOCHEMISTRY PROFILE                              
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1784-1787          Serum creatinine (mg/dL)                             
      CEP         18722    00.3-13.9                                            
                   1494    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1788-1793          Serum creatinine: SI (umol/L)                        
      CEPSI       18722    0026.5-1228.8                                        
                   1494    888888  Blank but applicable                         
                   9098    Blank                                                
                                                                                
        1794-1796          Serum iron (ug/dL)                       See note    
      SFP         14056    000-464                                              
                   1493    888   Blank but applicable                           
                  13765    Blank                                                
                                                                                
        1797-1800          Serum iron: SI (umol/L)                              
      SFPSI       14056    0000-83.1                                            
                   1493    8888  Blank but applicable                           
                  13765    Blank                                                
                                                                                
        1801-1804          Serum cholesterol (mg/dL)                See note    
      CHP         18721    0039-0748                                            
                   1495    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1805-1810          Serum cholesterol: SI (mmol/L)                       
      CHPSI       18721    01.009-19.343                                        
                   1495    888888  Blank but applicable                         
                   9098    Blank                                                
                                                                                
        1811-1814          Serum triglycerides (mg/dL)              See note    
      TRP         14056    0003-3900                                            
                   1493    8888  Blank but applicable                           
                  13765    Blank                                                
                                                                                
        1815-1820          Serum triglycerides: SI (mmol/L)                     
      TRPSI       14056    00.034-44.031                                        
                   1493    888888  Blank but applicable                         
                  13765    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                              BIOCHEMISTRY PROFILE                              
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1821-1823          Serum aspartate aminotransferase: SI                 
      ASPSI                (U/L)                                                
                  18723    006-517                                              
                   1493    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1824-1826          Serum alanine aminotransferase: SI                   
      ATPSI                (U/L)                                                
                  18723    001-486                                              
                   1493    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1827-1830          Serum gamma glutamyl transferase: SI     See note    
      GGPSI                (U/L)                                                
                  14549    0001-1342                                            
                   1495    8888  Blank but applicable                           
                  13270    Blank                                                
                                                                                
        1831-1834          Serum lactate dehydrogenase: SI                      
      LDPSI                (U/L)                                                
                  18721    0029-0970                                            
                   1495    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1835-1838          Serum alkaline phosphatase: SI (U/L)                 
      APPSI       18721    0017-0952                                            
                   1495    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1839-1842          Serum total protein (g/dL)                           
      TPP         18723    04.6-10.4                                            
                   1493    8888  Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1843-1845          Serum total protein: SI (g/L)                        
      TPPSI       18723    046-104                                              
                   1493    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                              BIOCHEMISTRY PROFILE                              
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1846-1848          Serum albumin (g/dL)                                 
      AMP         18723    0.9-6.1                                              
                   1493    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1849-1851          Serum albumin: SI (g/L)                              
      AMPSI       18723    009-061                                              
                   1493    888   Blank but applicable                           
                   9098    Blank                                                
                                                                                
        1852-1854          Serum globulin (g/dL)                    See note    
      GBP         14056    1.5-6.6                                              
                   1493    888   Blank but applicable                           
                  13765    Blank                                                
                                                                                
        1855-1857          Serum globulin: SI (g/L)                             
      GBPSI       14056    015-066                                              
                   1493    888   Blank but applicable                           
                  13765    Blank                                                
                                                                                
        1858-1860          Serum osmolality: SI (mmol/Kg)           See note    
      OSPSI       14056    241-352                                              
                   1493    888   Blank but applicable                           
                  13765    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                            DIABETES TESTING PROFILE                            
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1861-1864          Glycated hemoglobin: (%)                 See note    
      GHP         23476    02.8-16.2                                            
                   2166    8888  Blank but applicable                           
                   3672    Blank                                                
                                                                                
             1865          Glycated hemoglobin: test method         See note    
      GHPMETH     13892    1     Diamat method (instrument 1)                   
                   4811    2     Diamat method (instrument 2)                   
                   2549    3     Diamat method (instrument 3)                   
                   2224    4     Affinity method                                
                   2166    8     Blank but applicable                           
                   3672    Blank                                                
                                                                                
        1866-1870          Plasma glucose - first venipuncture      See note    
      G1P                  (mg/dL)                                              
                  15877    035.4-642.6                                          
                    674    88888 Blank but applicable                           
                  12763    Blank                                                
                                                                                
        1871-1876          Plasma glucose - first venipuncture: SI              
      G1PSI                (mmol/L)                                             
                  15877    01.965-35.671                                        
                    674    888888  Blank but applicable                         
                  12763    Blank                                                
                                                                                
        1877-1878          Incomplete glucose test (OGTT) code      See note    
      G1PCODE         2    20    Hemophiliac                                    
                     11    21    Chemotherapy within 4 weeks                    
                    301    22    Diabetic on insulin                            
                     98    23    Refused venipuncture                           
                     42    24    Ill/faint during test                          
                    142    25    Venipuncture unsuccessful                      
                     12    26    Physician canceled test                        
                    187    27    Refused glucose challenge                      
                    368    99    All remaining reasons                          
                  28151    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                            DIABETES TESTING PROFILE                            
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1879-1881          Minutes between glucose challenge and    See note    
      G1PTIM1              second venipuncture                                  
                   6640    086-178                                              
                    855    888   Blank but applicable                           
                  21819    Blank                                                
                                                                                
        1882-1884          Minutes between first and second         See note    
      G1PTIM2              venipuncture                                         
                   6637    094-184                                              
                    858    888   Blank but applicable                           
                  21819    Blank                                                
                                                                                
        1885-1889          Plasma glucose - second venipuncture     See note    
      G2P                  (mg/dL)                                              
                   6652    033.7-755.1                                          
                    843    88888 Blank but applicable                           
                  21819    Blank                                                
                                                                                
        1890-1895          Plasma glucose - second venipuncture: SI             
      G2PSI                (mmol/L)                                             
                   6652    01.871-41.916                                        
                    843    888888  Blank but applicable                         
                  21819    Blank                                                
                                                                                
        1896-1900          Serum C-peptide - first venipuncture     See note    
      C1P                  (pmol/mL)                                            
                     63    0.021 Below level of detection                       
                  15730    00.03-12.77                                          
                    758    88888 Blank but applicable                           
                  12763    Blank                                                
                                                                                
        1901-1905          Serum C-peptide - first venipuncture: SI             
      C1PSI                (nmol/L)                                             
                     63    0.021 Below level of detection                       
                  15730    00.03-12.77                                          
                    758    88888 Blank but applicable                           
                  12763    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                            DIABETES TESTING PROFILE                            
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1906-1911          Serum C-peptide - second venipuncture    See note    
      C2P                  (pmol/mL)                                            
                      1    00.021  Below level of detection                     
                   3365    00.075-15.363                                        
                    381    888888  Blank but applicable                         
                  25567    Blank                                                
                                                                                
        1912-1917          Serum C-peptide - second venipuncture:               
      C2PSI                SI (nmol/L)                                          
                      1    00.021  Below level of detection                     
                   3365    00.075-15.363                                        
                    381    888888  Blank but applicable                         
                  25567    Blank                                                
                                                                                
        1918-1923          Serum insulin - first venipuncture       See note    
      I1P                  (uU/mL)                                              
                     65    001.76  Below level of detection                     
                  15689    002.51-002367                                        
                    797    888888  Blank but applicable                         
                  12763    Blank                                                
                                                                                
        1924-1930          Serum insulin - first venipuncture: SI               
      I1PSI                (pmol/L)                                             
                     65    0010.56  Below level of detection                    
                  15689    0015.06-0014202                                      
                    797    8888888  Blank but applicable                        
                  12763    Blank                                                
                                                                                
             1931          Serum insulin - first venipuncture:      See note    
      I1P2PFLG             test kit                                             
                   2693    1     Kit 1                                          
                   1906    2     Kit 2                                          
                  11156    3     Kit 3                                          
                    796    8     Blank but applicable                           
                  12763    Blank                                                
                                                                                
        1932-1937          Serum insulin - second venipuncture      See note    
      I2P                  (uU/mL)                                              
                   3378    0002.7-823.01                                        
                    369    888888  Blank but applicable                         
                  25567    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                            DIABETES TESTING PROFILE                            
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1938-1944          Serum insulin - second venipuncture: SI              
      I2PSI                (pmol/L)                                             
                   3378    00016.2-4938.06                                      
                    369    8888888  Blank but applicable                        
                  25567    Blank                                                
                                                                                
                                                                               
                                                                                
                        NHANES III Laboratory Data File                         
                   Whole Blood, Serum, Plasma, and Urine Data                   
                                                                                
    ------------------------------------------------------------------------    
                                  URINE TESTS                                   
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        1945-1949          Urinary cadmium (ng/mL)                              
      UDP         22321    00.01-16.65                                          
                    749    88888 Blank but applicable                           
                   6244    Blank                                                
                                                                                
        1950-1955          Urinary cadmium: SI (nmol/L)                         
      UDPSI       22321    000.09-148.14                                        
                    749    888888  Blank but applicable                         
                   6244    Blank                                                
                                                                                
        1956-1960          Urinary creatinine (mg/dL)               See note    
      URP            83    007.9 Below level of detection                       
                  22162    011.3-682.1                                          
                    825    88888 Blank but applicable                           
                   6244    Blank                                                
                                                                                
        1961-1964          Urinary creatinine: SI (mmol/L)                      
      URPSI          83    00.7  Below level of detection                       
                  22162    0001-60.3                                            
                    825    8888  Blank but applicable                           
                   6244    Blank                                                
                                                                                
        1965-1970          Urinary albumin (ug/mL)                              
      UBP           386    0000.4  Below level of detection                     
                  21859    0000.5-015700                                        
                    825    888888  Blank but applicable                         
                   6244    Blank                                                
                                                                                
        1971-1977          Urinary iodine (ug/dL)                               
      UIP             5    00000.1  Below level of detection                    
                  22085    00000.5-0019750                                      
                    980    8888888  Blank but applicable                        
                   6244    Blank                                                
                                                                                
                                                                               
DEMOGRAPHIC DATA:  NOTES                                                        
                                                                                
                                                                                
Screener Questionnaire                                                          
                                                                                
                                                                                
DMPSTAT:  Examination/interview status                                          
                                                                                
     This variable identifies the interview or examination status of all        
     persons selected for the NHANES III sample.  Interviewed persons completed 
     preselected questions in specific sections of the Household Adult or       
     Youth Questionnaires.  Mobile examination center (MEC)-examined persons    
     were interviewed and successfully completed at least one examination       
     component in the MEC.  Home-examined persons were interviewed and          
     successfully completed at least one home examination component.  The       
     home examination was an option for frail older adults, infants 2-11        
     months of age, and other adults who were unable to come to the MEC.        
                                                                                
                                                                                
DMARETHN:  Race-ethnicity                                                       
                                                                                
     This key analytic variable, based on the NHANES III survey design, was     
     derived from many sources of data and is based on reported race and        
     ethnicity.  The other category includes all Hispanics, regardless of       
     race, who were not Mexican-American and also includes all non-Hispanics    
     from racial groups other than white or black.                              
                                                                                
                                                                                
DMARACER: Race                                                                  
                                                                                
     This variable was obtained from two primary sources: the Screener and      
     the Family Questionnaires.  Prior to the selection of the sample, race     
     (Black, White, Other) was self-reported or reported by proxy in the        
     Screener Questionnaire.  During the administration of the Family           
     Questionnaire, race was self-reported or reported by the respondent of     
     the Family Questionnaire from five categories (Aleut, Eskimo, American     
     Indian, Asian or Pacific Islander, Black, White, Other).  Responses from   
     the two sources were adjudicated, as necessary, to create a three level    
     variable (Black, White, Other).                                            
                                                                                
                                                                                
DMAETHNR:  Ethnicity                                                            
                                                                                
     This variable was obtained from two primary sources: the Screener and      
     the Family Questionnaires.  As part of both interviews, hand cards were    
     used to determine Mexican/Mexican-American or Other Latin                  
     American/Spanish ancestry or national origin.  Responses of non-Hispanic   
     ancestry or national origin were categorized as other.  Responses from     
     the two interviews were adjudicated, as necessary, and this three          
     level variable was created.                                                
                                                                                
                                                                                
HSAGEIR:  Age (Screener Questionnaire)                                          
                                                                                
     Age was calculated using the birth date which was obtained from the        
     Screener Questionnaire.  The variable HSAGEU provides the age unit         
     (months or years) for HSAGEIR.  Ages of 90 years or greater were recoded   
     into a single category of 90+ years to help protect the confidentiality    
     of survey participants.                                                    
                                                                                
                                                                               
HSAITMOR:  Age in months (Screener Questionnaire)                               
                                                                                
     Age in months was calculated by computing number of months between the     
     Screener Questionnaire date and date of birth.  This variable was          
     created for analyses where exact age at the interview may be needed.       
     HSAITMOR differs slightly from the age in years (HSAGEIR), the variable    
     most often used for analyses.  Ages of 1080 months and older (90 years     
     and older) were recoded into a single category of 1080+ months to          
     protect the confidentiality of survey participants.                        
                                                                                
                                                                                
HSFSIZER:  Family Size                                                          
                                                                                
     Family size represents the total number of related persons living in a     
     household (single dwelling unit).  All household members were rostered     
     by family during the Screener interview.  Household members who were       
     related to the family reference person (knowledgeable household member     
     17 years or older who owned or rented the dwelling unit) by blood or       
     marriage were considered part of the family.  Adopted children, foster-    
     and god-children were also included, if they were living in the dwelling   
     unit.  However, family members who were away at college, or living         
     independently were not included.  Other household members who were         
     unrelated to the reference person were considered members of separate      
     families.  Families with 10 members or more were recoded into a single     
     response category of 10+ persons to help protect confidentiality.  See     
     note for Household Size (HSHSIZER).                                        
                                                                                
                                                                                
HSHSIZER: Household Size                                                        
                                                                                
     Household size represents the total number of persons living in a single   
     dwelling unit, both related and unrelated.  All permanent household        
     members were rostered according to their family as part the Screener       
     interview.  This was done in order to obtain a complete list of all        
     persons living or staying in the dwelling unit, and to distinguish         
     household and family members.  Households with 10 members or more were     
     recoded into a single response category of 10+ persons to help protect     
     confidentiality.  See note for Family Size (HFHSIZER).                     
                                                                                
                                                                                
DMPCNTYR: County FIPS codes for United States counties with populations of      
                    500,000 and more                                            
                                                                                
     These county FIPS codes identify large counties with populations of        
     500,000 and more that were sampled in the survey.  Counties with           
     population less than 500,000 are not included to prevent identification    
     of these locations.  See Appendix 1 for listing of codes.                  
                                                                                
                                                                                
DMPFIPSR: State FIPS codes for United States counties with populations of       
                    500,000 and more                                            
                                                                                
     These state FIPS codes identify counties with populations of 500,000+      
     that were sampled in the survey.  Counties with population less than       
     500,000 are not included to prevent identification of these locations.     
     See Appendix 1 for listing of codes.                                       
                                                                                
                                                                               
DMPMETRO: Urbanization classification based on USDA Rural-Urban                 
                    continuum codes                                             
                                                                                
     These classifications are based on the USDA Rural-Urban codes (Butler and  
     Beale, 1993) that describe metro and nonmetro counties by degree of        
     urbanization and nearness to metro areas.  The USDA codes were recoded     
     into two categories to prevent identification of counties that were        
     sampled in the survey.                                                     
                                                                                
                                                                                
DMPCREGN: Census region                                                         
                                                                                
     The United States was divided into four broad geographic regions as        
     defined by the Bureau of Census.  Because all states were not included in  
     the selected sample, regional estimates may not be representative for a    
     given region.                                                              
                                                                                
                                                                                
DMPPIR: Poverty income ratio (or poverty index)                                 
                                                                                
     The poverty income ratio (PIR) was computed as a ratio of two              
     components.  The numerator was the midpoint of the observed family         
     income category in the Family Questionnaire variable:HFF19R.  The          
     denominator was the poverty threshold, the age of the family reference     
     person, and the calender year in which the family was interviewed.         
                                                                                
     Poverty threshold values (in dollars) are produced annually by the         
     Census Bureau (Series P-60).  These threshold values are based on          
     calendar years and adjusted for changes caused by inflation between        
     calendar years.  Reports for each of the calendar years in the survey      
     (1988-94) were used in the calculation of PIR.  For the years 1991 and     
     1994, data from preliminary reports were used.  The poverty income ratio   
     allows income data to be analyzed in a comparable manner across the six    
     years of the survey and with previous NHANES.                              
                                                                                
     Persons who reported having had no income and were assigned a zero value   
     for PIR.  A substantial proportion of persons refused to report their      
     income or income category during the Family Questionnaire.  Due to the     
     income nonresponse the potential for bias in PIR may be high.  Users are   
     cautioned to examine potential nonresponse bias for PIR and                
     other income variables.                                                    
                                                                                
                                                                               
Survey Design Data                                                              
                                                                                
                                                                                
SDPPHASE:  Phase of NHANES III survey                                           
                                                                                
     For operational purposes, 81 primary sampling units were divided into 89   
     survey locations (or stands) and randomly allocated to two three-year      
     phases.  Phase 1 data were collected from October 1988 through October     
     1991 and Phase 2 data were collected from October 1991 through October     
     1994.                                                                      
                                                                                
                                                                                
SDPSTRA6, SDPSTRA1, SDPSTRA2, and SDPPSU6, SDPPSU1, SDPPSU2: Pseudo strata      
                codes and pseudo PSU pair codes                                 
                                                                                
     Because NHANES III was based upon a complex sample design, the             
     assumptions of many statistical tests and routinely available              
     statistical programs are not met.  For this reason, when estimates of      
     the variances of statistics are computed, the technique of estimation      
     must be based upon complex sampling theory.  In order to provide users     
     with the capability of estimating the complex sample variances, 49         
     pseudo strata and a pair of Primary Sampling Unit (PSU) codes per          
     stratum were designed.                                                     
                                                                                
     A software package, "SUDAAN- Software for the Statistical Analysis of      
     Correlated Data" (Shah, 1995), was developed by the Research Triangle      
     Institute to analyze complex sample design data like NHANES.  SUDAAN       
     uses strata and PSU codes to conduct analysis with two PSU per stratum     
     design.  Therefore, definition of pseudo strata and PSU provided in this   
     data file should be used to compute complex sample variances in            
     analyses.  Other software available for estimation of complex sample       
     variance may also be used.  For further discussion of methods of           
     variance estimation in NHANES III, see additional information on this      
     subject in Weighting and Estimation Methodology (U.S. DHHS, 1996) and      
     NHANES III Analytic and Reporting Guidelines (U.S. DHHS, 1996).            
                                                                                
                                                                               
Sampling Weights                                                                
                                                                                
WTPFQX6, WTPFQX1, WTPFQX2: Total NHANES III and phase-specific final            
                interview weights                                               
                                                                                
     These sampling weights should be used only for items collected during      
     the household interviews.  To compute final interview weights, final       
     basic weights were first adjusted for nonresponse to household             
     interview, then post-stratified to the unpublished Current Population      
     Survey 1990 (Phase 1) and 1993 (Phase 2) population control estimates of   
     the U.S. population adjusted for undercount.  For details, see             
     Weighting and Estimation Methodology (U.S. DHHS, 1996) and NHANES III      
     Analytic and Reporting Guidelines (U.S. DHHS, 1996).                       
                                                                                
                                                                                
WTPFEX6, WTPFEX1, WTPFEX2: Total NHANES III and phase-specific final MEC        
                examination weights                                             
                                                                                
     These MEC sampling weights should be used for analysis of measurements     
     or interview items collected in the MEC.  Persons who were not examined    
     in the MEC have a sampling weight of zero and should be excluded from      
     analyses.  To compute final MEC examination weights, final interview       
     weights were first adjusted for nonresponse to MEC examinations, then      
     post-stratified to the unpublished Current Population Survey 1990          
     (Phase 1) and 1993 (Phase 2) population control estimates of the U.S.      
     population adjusted for undercount.  For details, see Weighting and        
     Estimation Methodology(U.S. DHHS, 1996) and NHANES III Analytic and        
     Reporting Guidelines (U.S. DHHS, 1996).                                    
                                                                                
                                                                                
WTPFHX6, WTPFHX1, WTPFHX2: Total NHANES III and phase-specific MEC+home         
                examination weights                                             
                                                                                
     These MEC+home sampling weights should be used for analysis of the         
     examination items where measurements or interview items were collected     
     in the MEC and home.  Persons who were not examined in the MEC or home     
     have a sampling weight of zero and should be excluded from analyses.  To   
     compute final MEC+home examination weights, final interview weights were   
     first adjusted for nonresponse to MEC and home examinations, then          
     post-stratified to unpublished Current Population Survey 1990 (Phase 1)    
     and 1993 (Phase 2) population control estimates of the U.S. population     
     adjusted for undercount.  No separate sampling weights were computed for   
     home examinees.  For details, see Weighting and Estimation Methodology     
     (U.S. DHHS, 1996) and NHANES III Analytic and Reporting Guidelines         
     (U.S. DHHS, 1996).                                                         
                                                                                
                                                                               
WTPFALG6, WTPFALG1, WTPFALG2: Total NHANES III and phase-specific allergy       
                examination subsample weights                                   
                                                                                
     These subsample weights are for analysis of allergy measurements.          
     Allergy skin reactivity tests were administered to all MEC-examined        
     persons aged 6-19 years and a random half-sample of the adults aged        
     20-59 years.  Eligible MEC-examined persons who did not complete the       
     allergy tests have a sampling weight of zero and should be excluded from   
     the analyses.  Final MEC examination weights were first adjusted for       
     selection of the half-sample among adults (20-59 years), and               
     post-stratified to the unpublished Current Population Survey 1990 (Phase   
     1) and 1993 (Phase 2) population control estimates of the U.S.             
     population adjusted for undercount in the final step.  For details, see    
     Weighting and Estimation Methodology (U.S. DHHS, 1996) and NHANES III      
     Analytic and Reporting Guidelines (U.S. DHHS, 1996).                       
                                                                                
                                                                                
WTPFCNS6, WTPFCNS1, WTPFCNS2: Total NHANES III and phase-specific central       
                nervous system (CNS) examination subsample final weights        
                                                                                
     These subsample weights are for analysis of measurements from the          
     Central Nervous System (CNS) test.  The CNS examination was administered   
     to a random half-sample of the adults aged 20-69 years.  Eligible          
     MEC-examined persons who did not complete CNS testing have a sampling      
     weight of zero and should be excluded from the analyses.  Final MEC        
     examination weights were first adjusted for selection of half sample       
     among adults (20-59 years), and post-stratified to unpublished Current     
     Population Survey 1990 (Phase 1) and 1993 (Phase 2) population control     
     estimates of the U.S. population adjusted for undercount in the final      
     step.  For details, see Weighting and Estimation Methodology               
     (U.S. DHHS, 1996) and NHANES III Analytic and Reporting Guidelines         
     (U.S. DHHS, 1996).                                                         
                                                                                
                                                                                
WTPFSD6, WTPFSD1, WTPFSD2: Total NHANES III and phase-specific morning          
                    session MEC examination subsample final weights             
                                                                                
     These subsample weights are for special analyses where fasting time may    
     be an important factor.  They were computed for persons aged 12 years      
     and older who were scheduled and examined in the MEC morning session.      
     Sampled households in the survey were randomly assigned to one of two      
     groups -- morning session ("standard") or afternoon/evening session        
     ("modified") assignments.  All sample persons from a household received    
     the same session assignment and were requested to schedule examinations    
     for the assigned session.  Fasting instructions varied by age and          
     session assignment (Plan and Operation of The Third National Health and    
     Nutrition Examination Survey, 1988-94 , U.S. DHHS, 1996).  It should be    
     noted that actual fasting time may have differed from the instructed       
     fasting time and can be obtained from the variable PHPFAST in the NHANES   
     III Laboratory Data  File.  To compute these weights, final MEC examination
     weights were first adjusted for the random half selection, then            
     adjusted for the non-response to assigned session, and finally,            
     post-stratified to the unpublished Current Population Survey 1990 and      
     1993 Population control estimates of the U.S. population adjusted for      
     undercount.  Eligible MEC-examined persons who were assigned to the morning
     session and examined in another session have a sampling weight of zero and 
     should be excluded in analyses.  For details, see Weighting and Estimation 
     Methodology (U.S. DHHS, 1996) and NHANES III Analytic and Reporting        
     Guidelines (U.S. DHHS, 1996).                                              
                                                                                
                                                                               
WTPFMD6, WTPFMD1, WTPFMD2: Total NHANES III and phase-specific                  
                    afternoon/evening session MEC examination subsample final   
                    weights                                                     
                                                                                
     These subsample weights are for special analyses where fasting time        
     might be an important factor.  They were computed for MEC examined         
     persons aged 12 years and older who were scheduled and examined in the     
     afternoon or evening sessions.  Sampled households in the survey were      
     randomly assigned to one of two groups -- morning session ("standard")     
     or afternoon/evening session ("modified") assignments.  All sample         
     persons from a household received the same session assignment and were     
     requested to schedule examinations for the assigned session.  Fasting      
     instruction varied by age and session assignments (Plan and Operation      
     of the Third National Health and Nutrition Examination Survey, 1988-94,    
     U.S. DHHS, 1996).  It should be noted that actual fasting                  
     time may have differed from the instructed fasting time and can be         
     obtained from the variable PHPFAST in the NHANES III Laboratory Data File.)
     compute these weights, final MEC examination weights were first adjusted   
     for the random half selection, then adjusted for the nonresponse to        
     assigned session, and finally, post-stratified to the unpublished Current  
     Population Survey 1990 and 1993 population control estimates of the U.S.   
     population adjusted for undercount.  Eligible MEC examined persons who were
     assigned to the afternoon or evening sessions and examined in              
     another session have a sampling weight of zero and should be excluded in   
     analyses.  For details, see Weighting and Estimation Methodology           
     (U.S.DHHS, 1996) and NHANES III Analytic and Reporting Guidelines          
     (U.S. DHHS, 1996).                                                         
                                                                                
                                                                                
WTPFHSD6, WTPFHSD1, WTPFHSD2: Total NHANES III and phase-specific morning       
                    session MEC+home examination subsample final post           
                    stratified weights                                          
                                                                                
     These subsample weights are for special analyses where fasting time may    
     be an important factor.  They were computed for MEC+home examined          
     persons aged 12 years and older who were scheduled and examined in the     
     morning session.  Sampled households in the survey were randomly           
     assigned to one of two groups -- morning session ("standard") or           
     afternoon/evening session ("modified") assignments.  All sample persons    
     from a household received the same session assignment and were requested   
     to schedule examinations for the assigned session.  Fasting instruction    
     varied by age and session assignments (Plan and Operations of the Third    
     National Health and Nutrition Examination Survey, 1988-94, U.S. DHHS,      
     1996).  It should be noted that actual fasting time may have differed from 
     the instructed  fasting time and can be obtained from the variable PHPFAST 
     in the NHANES III Laboratory Data File.  To compute  these weights, final  
     MEC+home examination weights were first adjusted for the random half       
     selection, then adjusted for the nonresponse to assigned session, and      
     finally, post-stratified to the unpublished Current Population Survey      
     1990 and 1993 population control estimates of the U.S. population adjusted 
     for undercount.  Eligible MEC+home examined persons who were assigned to   
     the morning session and examined in another session have a sampling weight 
     of zero and should be excluded in analyses.  For details, see Weighting and
     Estimation Methodology (U.S. DHHS, 1996) and NHANES III Analytic and       
     Reporting Guidelines (U.S. DHHS, 1996).                                    
                                                                                
                                                                               
WTPFHMD6, WTPFHMD1, WTPFHMD2: Total NHANES III and phase-specific afternoon/    
                    evening MEC+home examination subsample final weights        
                                                                                
     These subsample weights are for special analyses where fasting time may    
     be an important factor.  They were computed for MEC+home examined          
     persons aged 12 years and older who were scheduled and examined in the     
     afternoon or evening sessions.  Sampled households in the survey were      
     randomly assigned to one of two groups -- morning session ("standard")     
     or afternoon/evening session ("modified") assignments.  All sample         
     persons from a household received the same session assignment and were     
     requested to schedule examinations for the assigned session.  Fasting      
     instruction varied by age and session assignments (Plan and Operation      
     of the Third National Health and Nutrition Examination Survey, U.S. DHHS,  
     1996).  It should be noted that actual fasting time may have differed from 
     the instructed fasting time.  The actual fasting time can be obtained from 
     the variable PHPFAST in the NHANES III Laboratory Data File.  To compute   
     these weights, final MEC+home examination weights were first adjusted for  
     the random half selection, then adjusted for the nonresponse to assigned   
     session, and finally, post-stratified to the unpublished Current Population
     Survey 1990 and 1993 population control estimates of the U.S. population   
     adjusted for undercount.  Eligible MEC+home examined persons who were      
     assigned to the afternoon or evening sessions and examined in another      
     session have a sampling weight of zero and should be excluded in           
     analyses.  For details, see Weighting and Estimation Methodology           
     (U.S. DHHS, 1996) and NHANES III Analytic and Reporting Guidelines         
     (U.S. DHHS, 1996).                                                         
                                                                                
                                                                                
WTPQRP1--WTPQRP52: Fay's BRR Replicate interview sample                         
                                                                                
     To allow for alternative methods to estimate variance, 52 replicate        
     weights were computed using repeated sampling method where WESVAR or       
     other software that use repeated samples, can be used for estimating       
     variance.  Fay's method (see Fay, 1990; Judkins, 1990) was used to draw    
     half samples and adjust sampling weights in each of the random half        
     samples.  Sampling weights in one half sample were multiplied by the       
     factor k=1.7 and in the other half sample by k=0.3 using the Fay's         
     method.  After this adjustment, sampling weights were further adjusted     
     for non-response and post-stratified using the same procedure as the       
     final full sample interview weights.  These weights should be used only    
     for estimating variance of items from the household adult and youth        
     interviews.  For details, see Weighting and Estimation Methodology         
     (U.S. DHHS, 1996) and NHANES III  Analytic and Reporting Guidelines        
     (U.S. DHHS, 1996).                                                         
                                                                                
                                                                               
WTPXRP1--WTPXRP52: Fay's BRR Replicate weights for MEC- examined sample         
                                                                                
     To allow for alternative methods to estimate variance, 52 replicate        
     weights were computed using repeated sampling method where WESVAR or       
     other BRR type software can be used to estimate variance.  Fay's method    
     (see Fay, 1990; Judkins, 1990) was used to draw half samples and adjust    
     sampling weights in each of the random half samples.  Sampling weights     
     in one half sample were multiplied by the factor k=1.7 and in the other    
     half sample by k=0.3 using Fay's method.  After this adjustment, weights   
     were further adjusted for nonresponse and were post-stratified using the   
     same procedure as the full sample final weights.  These weights should     
     be used only for estimating variance of outcome measurements or            
     interview items from the MEC Examination.  For details, see additional     
     information on this subject in Weighting and Estimation Methodology        
     (U.S. DHHS, 1996) and NHANES III Analytic and Reporting Guidelines (U.S.   
     DHHS, 1996).                                                               
                                                                                
                                                                               
Household Youth Questionnaire                                                   
                                                                                
                                                                                
HYAITMO: Age in months (Household Youth Interview)                              
                                                                                
     Age in months was calculated by computing number of months between         
     Household Youth Interview date and the date of birth.  It was created for  
     special analyses where exact age at the interview may be needed. This      
     computed age may be different from the self-reported age in HSAGEIR and    
     HSAGEU, or HSAITMOR.  For most analyses, age reported in HSAGEIR (and      
     HSAGEU) should be used.                                                    
                                                                                
                                                                               
MEC Examination                                                                 
                                                                                
                                                                                
MXPLANG:  Language of MEC examination                                           
                                                                                
     This variables designates the language of conduct for the MEC examination. 
     questionnaires were designed to be implemented in a bilingual              
     (English/Spanish) format so that respondents could to be interviewed in    
     their preferred language.  When it was necessary to conduct an interview   
     in a another language, a translator assisted the interviewer in            
     administering the questionnaires.  These interviews were coded as other.   
                                                                                
                                                                                
MXPSESSR: Examination session for MEC examinees                                 
                                                                                
     This variable designates the period during the day that the examination    
     occurred.  To increase response rates and allow flexibility, examinations  
     were scheduled in three sessions:  morning, afternoon and evening.  On     
     occasion, more than one session was attended in order to complete the full 
     examination. In such a situation, the session was coded as the one when    
     most of the examinations were completed.                                   
                                                                                
                                                                                
MXPAXTMR:  Age in months at MEC examination                                     
                                                                                
     Age in total months was created for special analyses where exact age at the
     examination may be needed (e.g., computation of growth charts).  It was    
     calculated by computing number of months between examination date and the  
     date of birth.  Some examinees may have had a birthday between household   
     interview and examination so that this computed age at examination may     
     differ slightly from the age reported in HSAGEIR (and HSAGEU), or HSAITMOR.
     For most analyses age reported in HSAGEIR (and HSAGEU) should be used.     
     Ages of 1080 months and older (90 years and older) were recoded into a     
     single category of 1080+ months to protect the confidentiality of survey   
     participants.                                                              
                                                                                
                                                                               
Home Examination                                                                
                                                                                
                                                                                
HXPAXTMR:  Age in months at home examination                                    
                                                                                
     Age in total months was created for special analyses where exact age at the
     examination may be needed (e.g., computation of growth charts).  It was    
     calculated by computing number of months between examination date and the  
     date of birth.  Some examinees may have had a birthday between household   
     interview and examination so that this computed age at examination may     
     differ slightly from the age reported in HSAGEIR (and HSAGEU), or HSAITMOR.
     For most analyses age reported in HSAGEIR (and HSAGEU) should be used.     
     Ages of 1080 months and older (90 years and older) were recoded into a     
     single category of 1080+ months to protect the confidentiality of survey   
     participants.                                                              
                                                                                
                                                                                
HXPSESSR: Examination session for home examinees                                
                                                                                
     This variable designates the period during the day that the examination    
     occurred.  To increase response rates and allow flexibility, examinations  
     were scheduled in three sessions:  morning, afternoon and evening.  On     
     occasion, more than one session was attended in order to complete the full 
     examination. In such a situation, the session was coded as the one when    
     most of the examinations were completed.                                   
                                                                                
                                                                               
References                                                                      
                                                                                
Butler MA, Beale CL. Rural-urban continuum codes for metro and nonmetro         
counties, 1993.  Agriculture and Rural Economy Division, Economic Research      
Services, U.S. Department of Agriculture, Staff Report No. AGES-9425, 1993.     
                                                                                
Fay RE. VPLX: Variance Estimates for Complex Surveys. In: Proceedings of the    
Survey Research Methods section of the American Statistical Association, pp.    
266-271, 1990.                                                                  
                                                                                
Judkins DR. Fay's method for variance estimation. Journal of Official Statistics
6 (3):223-239. 1990.                                                            
                                                                                
U.S. Department of Health and Human Services(DHHS). National Center for Health  
Statistics.  NHANES III Reference Manuals and Reports (CD-ROM). Hyattsville,Md.:
Centers for Disease Control and Prevention, 1996.  Available from National      
Technical Information Service (NTIS), Springfield,Va. (Acrobat.PDF format;      
includes access software: Adobe Systems Inc.  Acrobat Reader 2.1)               
                                                                                
Shah BV, Barnwell BG, Bieler GS. SUDAAN User's Manual: Software for Analysis of 
Correlated Data, Release 6.04. Research Triangle Park, North Carolina. 1995.    
                                                                                
                                                                               
Appendix 1.  State and county FIPS codes for areas with populations             
             of 500,000 or more.                                                
                                                                                
    DMPFIPSR   State            DMPCNTYR     County                             
                                                                                
    4          Arizona          13           Maricopa                           
    6          California       1            Alameda                            
    6          California       19           Fresno                             
    6          California       37           Los Angeles                        
    6          California       59           Orange                             
    6          California       71           San Bernardino                     
    6          California       73           San Diego                          
    6          California       85           Santa Clara                        
    6          California       111          Ventura                            
    12         Florida          25           Dade                               
    12         Florida          31           Duval                              
    12         Florida          99           Palm Beach                         
    17         Illinois         31           Cook                               
    25         Massachusetts    17           Middlesex                          
    26         Michigan         125          Oakland                            
    26         Michigan         163          Wayne                              
    29         Missouri         189          St Louis                           
    36         New York         29           Erie                               
    36         New York         47           Kings                              
    36         New York         59           Nassau                             
    36         New York         61           New York                           
    36         New York         81           Queens                             
    36         New York         119          Westchester                        
    39         Ohio             35           Cuyahoga                           
    39         Ohio             61           Hamilton                           
    42         Pennsylvania     3            Allegheny                          
    42         Pennsylvania     45           Delaware                           
    42         Pennsylvania     101          Philadelphia                       
    44         Rhode Island     7            Providence                         
    48         Texas            29           Bexar                              
    48         Texas            113          Dallas                             
    48         Texas            141          El Paso                            
    48         Texas            201          Harris                             
    48         Texas            439          Tarrant                            
    53         Washington       33           King                               
                                                                                
                                                                               
LABORATORY DATA: NOTES                                                          
                                                                                
AAP:  Serum apolipoprotein AI                                                   
                                                                                
     Apolipoprotein AI and apolipoprotein B results were measured only          
     during 1988-1991.  Three different methods were used at different times    
     to measure apolipoprotein AI and apolipoprotein B.  These were radial      
     immunodiffusion (RID), rate immunonephelometry (INA), and the World        
     Health Organization -International Federation of Clinical Chemistry        
     (WHO-IFCC) method (Bachorik, 1994; Marcovina, 1991; Albers, 1989).         
     Results using the RID and INA methods were adjusted to the WHO-IFCC        
     method.                                                                    
                                                                                
                                                                                
ABP:  Serum apolipoprotein B                                                    
                                                                                
     See note for AAP.                                                          
                                                                                
                                                                                
ANP:  Anisocytosis                                                              
                                                                                
     Microscopic examination (manual differential) of the peripheral blood      
     spread on a glass slide utilized a stained blood film to perform a         
     differential leukocyte count, evaluate red cell morphology, and            
     estimate number of platelets.  Manual differential variables include       
     segmented neutrophils, lymphocytes, monocytes, eosinophils, basophils,     
     blasts, promyelocytes, metamyelocytes, myelocytes, bands, atypical         
     lymphocytes, anisocytosis, basophilic stippling, hypochromia,              
     poikilocytosis, polychromatophilia, macrocytosis, microcytosis, sickle     
     cells, spherocytosis, target cells, toxic granulation, and vacuolated      
     cells (GRPDIF,  LMPDIF,  MOPDIF,  EOP,  BAP,  BOP, BLP, PRP, MEP, MLP,     
     BAP, LAP, ANP, BSP, HZP, PKP, POP, MRP, MIP, SIP, SHP, TTP, TXP, and       
     VUP).                                                                      
                                                                                
     In NHANES III, a manual differential was performed on a special            
     subsample of examinees aged one year and older.  This manual               
     differential was used for internal quality control purposes and to         
     confirm abnormal hematology results.  This subsample was defined as a      
     random 10-percent sample of all examined persons plus all examinees        
     who had a predetermined high or low value for one or more of the           
     following hematologic assessments:  white blood cell count (WBC), red      
     blood cell count (RBC), hemoglobin, hematocrit, mean cell volume (MCV),    
     mean cell hemoglobin (MCH), mean cell hemoglobin concentration (MCHC),     
     red blood cell distribution width (RDW), platelet count, mean platelet     
     volume (MPV), lymphocyte percentage, mononuclear percentage, or            
     granulocyte percentage.  A table of predetermined high and low values      
     for WBC, RBC, hemoglobin, hematocrit, MCV, MCH, MCHC, RDW, platelet        
     count, MPV, lymphocyte percentage, mononuclear percentage, and             
     granulocyte percentage is located in the Manual for Medical Technicians    
     (U.S. DHHS, pp. 5-54 and 5-55, 1996).                                      
                                                                                
                                                                                
BAP:  Band cells                                                                
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                               
BCP:  Serum beta carotene                                                       
                                                                                
     The lower limit of detection (LOD) for beta carotene was 0.67 ug/dL.       
     Using the LOD coding formula (detection limit divided by the square        
     root of two), the calculated value to indicate that the serum beta         
     carotene results were below the level of detection would be 0.48.  After   
     rounding, the value of 0 (zero) was placed in the results field to         
     indicate that the serum beta carotene was below 0.67 ug/dL.                
                                                                                
                                                                                
BLP:  Blast cells                                                               
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
BOP:  Basophil cells                                                            
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
BSP:  Basophilic stippling                                                      
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
C1P:  Serum C-peptide (first venipuncture)                                      
                                                                                
     The specimen for this assay was obtained at the time of the initial        
     venipuncture.  This result is available for all six years of the           
     survey.                                                                    
                                                                                
     Examinees aged 40-74 years who used insulin were excluded from the         
     OGTT.  A first venipuncture was obtained, but the glucose challenge and    
     second venipuncture were canceled.  In these instances, the variables      
     G1P, C1P and I1P have a value, but the results G2P, C2P and I2P from the   
     second venipuncture are blank-filled to indicate a medical exclusion.      
                                                                                
                                                                                
C2P:  Serum C-peptide (second venipuncture)                                     
                                                                                
     Post-glucose challenge levels of C-peptide and insulin for examinees       
     who had an OGTT were measured only during 1991-1994.                       
                                                                                
                                                                                
CHP:  Serum cholesterol                                                         
                                                                                
     This value was obtained from the standard battery of biochemical           
     assessments.  Use of the laboratory test result from the reference         
     method (TCP), rather than the CHP value, is generally recommended.         
     For most analyses of serum cholesterol, the appropriate variable to use    
     will be TCP.  The value from the biochemistry profile (CHP) should not     
     be used routinely.  Consult the Laboratory Procedures Used for NHANES      
     III (U.S. DHHS, 1996) for the details.                                     
                                                                                
                                                                                
COP:  Serum cotinine                                                            
                                                                                
     Only cotinine results from 1988-1991 are included in this field.           
                                                                                
                                                                               
DHP:  Serum hepatitis D antibody                                                
                                                                                
     Hepatitis B virus testing scheme:  From 1988-1991, all sera were           
     tested for the core antibody to hepatitis B virus (anti-HBc).  If this     
     test was positive, the sera were tested for the hepatitis B surface        
     antigen (HBsAg) and hepatitis B surface antibody (anti-HBs).  If the       
     HbsAg test was positive and the anti-HBs test was <10 mIU, then the        
     antibody to hepatitis D virus (anti-HDV) test was performed.  If the       
     HbsAg test was negative and the anti-HBs test was <10 mIU, then the        
     anti-HBc test was repeated for confirmation.                               
                                                                                
     In June 1993, all sera were tested for both anti-HBc and anti-HBs.         
     Sera testing positive for anti-HBc were tested further for HBsAg, and      
     positive HBsAg samples were tested for anti-HDV.                           
                                                                                
                                                                                
EOP:  Eosinophil cells                                                          
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
FEP:  Serum iron                                                                
                                                                                
     Laboratory methods differed between NHANES III and previous surveys.       
     Therefore, results may not be comparable between surveys.  Consult the     
     Laboratory Procedures Used for NHANES III (U.S. DHHS, 1996).               
                                                                                
                                                                                
FOP:  Serum folate                                                              
                                                                                
     Laboratory methods differed between NHANES III and previous surveys.       
     Therefore, results may not be comparable between surveys.  Consult the     
     Laboratory Procedures Used for NHANES III (U.S. DHHS, 1996).               
                                                                                
                                                                                
G1P:  Plasma glucose (first venipuncture)                                       
                                                                                
     Plasma glucose was measured using the reference method on examinees        
     aged 20 years and older.  Consult the Laboratory Procedures Used for       
     NHANES III (U.S. DHHS, 1996) for details.                                  
                                                                                
     During NHANES III, OGTT testing was conducted on MEC examinees aged        
     40-74 years.  A random assignment was made prior to conducting the OGGT    
     to determine who should receive a morning examination (NCHS, 1994; U.S.    
     DHHS, 1996).  As a result, approximately half of the OGGT examinees        
     received the morning OGTT after an overnight fast.  This subsample         
     most closely conformed to the World Health Organization (WHO) criteria     
     for OGTT testing to identify diabetes (WHO, 1995).  Therefore, this        
     morning subsample is the NHANES III subsample that should be used to       
     estimate the prevalence of diabetes and impaired glucose tolerance.        
     People who reported a medical history of diabetes but who were not using   
     insulin therapy were asked to conform to the fasting instructions for      
     their examination session and were eligible for an OGTT if the age         
     criteria were satisfied.  The morning sample weights (WTPFHSD6) for        
     total NHANES III weights for the morning OGTT subsample should be used     
     when weighting these data to generate national estimates.  Data from the   
     afternoon and evening OGTTs do not conform to the WHO protocol for         
     diagnosing diabetes or IGT and should not be used for these purposes.      
                                                                                
     If an examinee was given an OGTT during an examination session other       
     than the session assigned, that examinee's sample weight for the           
                                                                               
     assigned session will be zero.  For example, if an examinee was            
     selected for a morning OGTT but was tested in the afternoon, the           
     examinee's morning sample weight for the OGTT will be zero.                
                                                                                
                                                                                
G1PCODE:  Reasons for an incomplete glucose tolerance test                      
                                                                                
     The reason for which an examinee aged 40-74 years did not complete the     
     OGTT was entered in this field.  This field either will contain an         
     incomplete OGTT code or will be blank.  Examinees who responded            
     affirmatively to the hemophilia question (code 20) or who received         
     chemotherapy within the past four weeks (code 21) were excluded from       
     venipuncture.  Examinees who reported on their examination day that        
     they used insulin therapy (code 22) were excluded from the OGTT.  Codes    
     23-27 were recoded from comments and  notations on the questionnaires      
     and may not include complete data on these reasons.                        
                                                                                
                                                                                
G1PTIM1:  Interval between glucose drink and second venipuncture in minutes     
                                                                                
     If an examinee was aged 40-74 years and received the OGTT, the time        
     that the glucose drink was consumed and the time of the second             
     venipuncture were recorded.  This variable contains the calculated time    
     difference between the glucose drink consumption and the second            
     venipuncture.                                                              
                                                                                
                                                                                
G1PTIM2:  Interval between first and second venipuncture in minutes             
                                                                                
     If an examinee was aged 40-74 years and received the OGTT, two timed       
     venipunctures were performed.  This variable contains the calculated       
     time difference between the first and second venipunctures.                
                                                                                
                                                                                
G2P:  Plasma glucose (second venipuncture)                                      
                                                                                
     See notes for C1P and G1P.                                                 
                                                                                
                                                                                
GBP:  Serum globulin                                                            
                                                                                
     Globulin results were added to the protocol after NHANES III began.        
     This result field was blank-filled for examinees who were examined         
     prior to the start of testing.                                             
                                                                                
                                                                                
GGPSI:  Serum gamma glutamyl transferase                                        
                                                                                
     Gamma glutamyl transferase results were added to the protocol after        
     NHANES III began.  This result field was blank-filled for examinees        
     who were examined prior to the start of testing.                           
                                                                                
                                                                                
GHP:  Glycated hemoglobin (HbA1c)                                               
                                                                                
     Glycohemoglobin measurements for NHANES III were performed by the          
     Diabetes Diagnostic Laboratory at the University of Missouri --            
     Columbia using the Diamat Analyzer System (Bio-Rad Laboratories,           
     Hercules, CA).  This ion-exchange HPLC system measures HbA1c (a specific   
     glycohemoglobin) and has demonstrated excellent, long-term precision       
     (interassay CV's 2.0).  It was standardized to the reference method        
                                                                               
     that was used for the Diabetes Control and Complications Trial (DCCT).     
     Variant hemoglobins, including hemoglobin C, D, F, and elevated HbF,       
     can interfere with HbA1c measurement by the Diamat HPLC.  Hemoglobin S     
     in its heterozygous state does not interfere with this assay.  Although    
     interferences usually can be detected by an abnormal Diamat                
     chromatogram, HbA1c results for these specimens were not considered        
     valid.  Therefore, samples containing hemoglobin variants or elevated      
     HbF or samples that produce chromatograms indicating hemoglobin            
     degradation were analyzed by an alternate method that used affinity        
     chromatography to separate glycohemoglobin.  Affinity chromatographic      
     methods were not affected by the presence of hemoglobin variants and       
     were less sensitive to hemoglobin degradation due to improper sample       
     handling.  The affinity method used also was standardized to the DCCT      
     reference method.  Reasons for using the affinity method for an            
     examinee's test included an extra peak on the chromatogram, hemoglobin     
     C, elevated hemoglobin F, or other abnormal hemoglobin.                    
                                                                                
                                                                                
GHPMETH:  Glycated hemoglobin method                                            
                                                                                
     See note for GHP.                                                          
                                                                                
                                                                                
GRP:  Granulocyte number                                                        
                                                                                
     Consult the Manual for Medical Technicians for the Coulter granulocyte     
     number, lymphocyte number, mononuclear number, white blood cell count,     
     red blood cell count, and platelet count units (U.S. DHHS, 1996).          
                                                                                
                                                                                
GRPDIF:  Segmented neutrophil cells                                             
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
HBP:  Serum hepatitis B core antibody                                           
                                                                                
     See note for DHP.                                                          
                                                                                
                                                                                
HGP:  Hemoglobin                                                                
                                                                                
     In NHANES I, NHANES II, and HHANES, determinations of red and white        
     blood cell counts were made using a semiautomated cell counter             
     (Coulter model FN).  Determinations of hemoglobin concentration (Hb)       
     were made using a Coulter hemoglobinometer, and determinations of packed   
                                                                               
     cell volume (PCV) were made using the microhematocrit centrifuge method.   
     The hematologic indices MCH, MCHC, and MCV were calculated as follows:     
                                                                                
          MCH = Hb/RBC                                                          
          MCHC = Hb/PCV                                                         
          MCV = PCV/RBC                                                         
                                                                                
                                                                                
     In NHANES III, these hematologic parameters were determined by using a     
     fully automated Coulter S+JR hematology analyzer.  These analyzers         
     measured the mean (red) cell volume (MCV) directly, utilizing a            
     process of continuous integration of pulse heights divided by the pulse    
     number; PCV values were calculated through the multiplication of MCV and   
     RBC.                                                                       
                                                                                
     Although it has been shown that identified errors in the                   
     microhematocrit method caused by plasma trapping and red cell              
     dehydration approximately compensate each other (Bull, 1990), packing      
     errors can occur in macrocytic anemia and can be considerable in sickle    
     cell anemia, spherocytosis, and thalassemias (NCCLS, 1993).  Therefore,    
     individual values for MCV, PCV ("hematocrit"), and MCHC from NHANES III    
     cannot be compared directly to values from the previous NHANES.            
                                                                                
                                                                                
HPP:  Serum Helicobacter pylori antibody                                        
                                                                                
     H. pylori antibody testing was performed on surplus sera from children     
     and adolescents aged 6-19 years.  This result field was blank-filled       
     for examinees aged 6-19 years for whom surplus specimens were not          
     available for testing.  Due to variability in the laboratory test          
     (Pylori Stat, Whittaker Bioproducts, Inc.), 50 percent of the assays       
     were repeated randomly.  There was a seven-percent error rate in which     
     the first result (HPP) did not match the repeat result (HPQ).  The         
     original result was kept if the controls on the ELISA plate were within    
     the acceptable range.  Testing on adults will be performed at a later      
     date using the same assay.                                                 
                                                                                
                                                                                
HTP:  Hematocrit                                                                
                                                                                
     See note for HGP.                                                          
                                                                                
                                                                                
HZP:  Hypochromia                                                               
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
I1P:  Serum insulin (first venipuncture)                                        
                                                                                
     This is the adjusted insulin value for examinees.  Most of the insulin     
     values in NHANES III (1988-1991) were adjusted because the                 
     manufacturer of the laboratory testing kits changed during that period.    
     An indicator of the kit number is located in the I1P2PFLG field (i.e., 1   
     = Kit 1, 2 = Kit 2, and 3 = Kit 3).  All insulin values from Kit 1 and     
     Kit 2 assays were adjusted linearly to match the Kit 3 numbers.  Further   
     information on this adjustment procedure is available in the Laboratory    
     Procedures Used for NHANES III (U.S. DHHS, 1996).                          
                                                                                
                                                                               
     The equations used to adjust the data were:                                
                                                                                
     Kit 3 = 0.787 (Kit 1) + 0.832      Equation 1                              
     Kit 3 = 0.597 (Kit 2) + 1.746      Equation 2                              
                                                                                
     The following steps were used to make the adjustment:                      
                                                                                
     1.  Equation 1 was applied to group 1 (Kit 1) data                         
     2.  Equation 2 was applied to group 2 (Kit 2) data                         
     3.  Group 3 data (Kit 3) were left unchanged.                              
                                                                                
                                                                                
     The time periods for the insulin kits were as follows:                     
                                                                                
     Group          Assay Period                  Assay Method                  
                                                                                
     1              10/88-01/05/90             Kit 1                            
     2              01/06/90-09/06/90          Kit 2                            
     3              11/01/90-end of study      Kit 3                            
                                                                                
     See note for C1P.                                                          
                                                                                
                                                                                
I1P2PFLG:  Insulin adjustment flag                                              
                                                                                
     This field shows which kit was used for the original insulin               
     measurement.                                                               
                                                                                
                                                                                
I2P:  Serum insulin (second venipuncture)                                       
                                                                                
     See notes for C1P, C2P and I1P.                                            
                                                                                
                                                                                
ICPSI:  Serum normalized calcium                                                
                                                                                
     This variable contains the normalized calcium value derived from           
     adjusting the measured ionized calcium for pH.  Consult the Laboratory     
     Procedures Used for NHANES III (U.S. DHHS, 1996) for details.              
                                                                                
                                                                                
L1P:  Serum latex antibody                                                      
                                                                                
     Latex antibody testing was performed on surplus sera from persons ages     
     17-60 years who were examined in phase 1 (1988-                            
     91). This result field was blank-filled for examinees ages 17-60 years     
     for whom surplus specimens were not available for testing.                 
                                                                                
                                                                                
LAP:  Atypical lymphocyte cells                                                 
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
LCP:  Serum LDL cholesterol calculation                                         
                                                                                
     The value for LDL was calculated by the Friedewald equation as             
     follows:                                                                   
                                                                                
     LDL = total cholesterol - high density cholesterol - triglyceride/5.       
                                                                                
                                                                               
     Because the equation is not valid when serum triglyceride values           
     exceed 400 mg/dL, the LDL is missing when serum triglyceride (TGP)         
     exceeds 400 mg/dL.                                                         
                                                                                
     Serum LDL was calculated on examinees who were instructed to fast          
     (ages 12 and older) and who did fast at least nine hours, were examined    
     in the morning, and were randomly assigned to the morning fasting sample   
     (WTPFHSD6 > 0). Therefore, LDL would be blank if examinees were aged       
     less than 12 years, fasted fewer than nine hours, were examined in an      
     afternoon or evening session, or were not randomly assigned to the         
     morning session.  For the purpose of this calculation, the number of       
     hours fasted was rounded to the nearest whole integer.                     
                                                                                
     For more information regarding this equation, refer to the Laboratory      
     Procedures Used for NHANES III (U.S. DHHS, 1996).                          
                                                                                
                                                                                
LMP:  Lymphocyte number                                                         
                                                                                
     See note for GRP.                                                          
                                                                                
                                                                                
LMPDIF:  Lymphocyte cells                                                       
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
LUP:  Serum lutein/zeaxanthin                                                   
                                                                                
     The lower limit of detection (LOD) for lutein/zeaxanthin was 0.43          
     ug/dL.  Using the LOD coding formula (detection limit divided by the       
     square root of two), the calculated value indicating that the serum        
     lycopene results were below the level of detection would be 0.30.  After   
     rounding, the value of 0 (zero) was placed in the results field to         
     indicate that the serum lutein/zeaxanthin was below 0.43 ug/dL.            
                                                                                
                                                                                
LYP:  Serum lycopene                                                            
                                                                                
     The lower limit of detection (LOD) for lycopene was 0.63 ug/dL.  Using     
     the LOD coding formula (detection limit divided by the square root of      
     two), the calculated value indicating that the serum lycopene results      
     were below the level of detection would be 0.44.  After rounding, the      
     value of 0 (zero) was placed in the results field to indicate that the     
     serum lycopene was below 0.63 ug/dL.                                       
                                                                                
                                                                                
MCPSI:  Mean cell hemoglobin                                                    
                                                                                
     See note for HGP.                                                          
                                                                                
                                                                                
MEP:  Metamyelocyte cells                                                       
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
MHP:  Mean cell hemoglobin concentration                                        
                                                                                
     See note for HGP.                                                          
                                                                                
                                                                               
MIP:  Microcytosis                                                              
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
MLP:  Myelocyte cells                                                           
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
MOP:  Mononuclear number                                                        
                                                                                
     See note for GRP.                                                          
                                                                                
                                                                                
MOPDIF:  Monocyte cells                                                         
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
MRP:  Macrocytosis                                                              
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
MVPSI:  Mean cell volume                                                        
                                                                                
     See note for HGP.                                                          
                                                                                
                                                                                
OSPSI:  Serum osmolality                                                        
                                                                                
     Results for osmolality were added to the protocol after NHANES III         
     began.  This result field is blank-filled for examinees who were           
     examined prior to the start of testing.                                    
                                                                                
                                                                                
PHPBEST:  Time of venipuncture                                                  
                                                                                
     The time of venipuncture is expressed using the 24-hour clock system       
     (military time) in which 01:00 corresponds to 1:00 a.m., 12:00             
     corresponds to 12 noon, 13:00 corresponds to 1:00 p.m., and 00:00          
     corresponds to 12 midnight.                                                
                                                                                
                                                                                
PHPCHM2:  Within the past four weeks have you received any cancer               
   chemotherapy treatment?                                                      
                                                                                
     All examinees who indicated at the time of venipuncture that they had      
     received cancer chemotherapy treatment in the past two weeks (later        
     this was changed to four weeks) were excluded from venipuncture.  For      
     these examinees, results fields for blood-based analyses are               
     blank-filled.                                                              
                                                                                
                                                                               
 PHPFAST:  Calculated fasting time in hours                                     
                                                                                
     The fasting time was calculated using the time of venipuncture and the     
     time the examinee last ate or drank (other than water).  This was          
     determined using the snack/drink time and the corresponding day            
     variables.  Fasting time is the elapsed interval between the time the      
     examinee last ate or drank and the time of venipuncture.                   
                                                                                
     The following variables were used to calculate this variable:              
     PHPSNTI, PHPSNDA, PHPDRIN, PHPDRTI, PHPDRDA, and  PHPBEST.  If the         
     examinee drank only water since he/she last ate (PHPDRIN = 2), then the    
     time and day the examinee last ate (PHPSNTI and PHPSNDA) were subtracted   
     from the time and day of the venipuncture (PHPBEST).  The difference was   
     the number of hours between the time the examinee last ate and the time    
     of the venipuncture.                                                       
                                                                                
     If the examinee drank anything other than water (PHPDRIN = 1), then        
     the time and day the examinee last drank (PHPDRTI and PHPDRDA) were        
     subtracted from the time and day of the venipuncture (PHPBEST).  The       
     difference was the number of hours between the time the examinee last      
     drank and the time of the venipuncture.                                    
                                                                                
                                                                                
PHPHEMO:  Do you have hemophilia?                                               
                                                                                
     All examinees who indicated at the time of venipuncture that they had      
     hemophilia, a hereditary blood-clotting disorder, were excluded from       
     the venipuncture.  Results for blood analyses were blank-filled.           
                                                                                
                                                                                
PHPINSU:  Are you currently taking insulin?                                     
                                                                                
     See note for G1P and G1PCODE.                                              
                                                                                
                                                                                
PHPLANG:  Language of the venipuncture screening questionnaire                  
                                                                                
     Both English and Spanish versions of the venipuncture screening            
     questionnaire were used.  The language used depended on the preference     
     of the examinee.  Translators, either hired or friends/family members,     
     were available for examinees who spoke neither Spanish nor English.        
                                                                                
                                                                                
PKP:  Poikilocytosis                                                            
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
PLP:  Platelet count                                                            
                                                                                
     See note for GRP.                                                          
                                                                                
                                                                                
POP:  Polychromatophilia                                                        
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
PRP:  Promyelocyte cells                                                        
                                                                                
     See note for ANP.                                                          
                                                                               
PXP:  Serum transferrin saturation                                              
                                                                                
     This value was calculated as (FEP/ TIP) * 100.                             
                                                                                
                                                                                
RBP:  RBC folate                                                                
                                                                                
     See note for FOP.                                                          
                                                                                
                                                                                
RCP:  Red blood cell count                                                      
                                                                                
     See notes for HGP and GRP.                                                 
                                                                                
                                                                                
RUP:  Serum rubella antibody                                                    
                                                                                
     Rubella antibody data are reported both as an optical density index        
     and in International Units.  The index was calculated by subtracting the   
     absorbance of the control well from the absorbance of the antigen well     
     (AG-NS) and dividing the difference by the cut-off value.  The cut-off     
     value was calculated as the mean AG-NS value of duplicate 10 IU            
     standards.  The equation used was:                                         
                                                                                
     O.D. index  = (AG-NS)/Cut-off value                                        
                                                                                
     An O.D. index greater than or equal to one indicates the presence of       
     antibody.                                                                  
                                                                                
                                                                                
RUPUNIT:  Serum rubella antibody (IU)                                           
                                                                                
     Rubella antibody data are reported both as an optical density index        
     and in International Units.  International Units were calculated based     
     on a standard curve using a regression analysis of duplicate AG-NS         
     values of 10, 40, & 100 IU standards and their squares.  An                
     International Unit value greater than or equal to 10 indicates the         
     presence of antibody.                                                      
                                                                                
                                                                                
SAP:  Serum hepatitis B surface antigen                                         
                                                                                
     See note for HBP.                                                          
                                                                                
                                                                                
SEP:  Serum selenium                                                            
                                                                                
     Selenium values were measured on two Perkin-Elmer graphite furnace         
     atomic absorption spectrophotometers (model 3030 and model 5100)           
     during the six-year study.  Based on a comparability study using linear    
     models, the results generated using the Model 5100 instrument (from        
     12/07/90 to 1/13/95) were on average 4.3 percent higher than those from    
     the Model 3030 instrument (used from 10/1/88 to 12/06/90).  Since the      
     Model 5100 represented more precise measurements, the model 3030 data      
     were adjusted to make them comparable to the Model 5100.  Perkin-Elmer     
     Model 5100 Zeeman-corrected graphite furnace atomic absorption             
     spectrophotometer testing began on 12/07/90.  All selenium values          
     measured prior to 12/07/90 were adjusted to the AA5100 values.  The        
     formula used was:                                                          
                                                                                
     New value = 16.795 + 0.902 * original value.                               
                                                                               
SFP:  Serum iron                                                                
                                                                                
     This value was obtained from the standard battery of biochemical           
     assessments.  Use of the laboratory test result from the reference         
     method (FEP), rather than the SFP value, is generally recommended.         
     For most analyses of serum iron, the appropriate variable to use will be   
     FEP.  The value from the biochemistry profile (SFP) should not be used     
     routinely.  Consult the Laboratory Procedures Used for NHANES III          
     (U.S. DHHS, 1996) for details.  Laboratory test results for SFP were       
     added to the protocol after NHANES III began.  This result field was       
     blank-filled for examinees who were examined prior to the start of         
     testing.                                                                   
                                                                                
                                                                                
SGP:  Serum glucose                                                             
                                                                                
     This value was obtained from the standard battery of biochemical           
     assessments.  Use of the laboratory test result for plasma glucose         
     from the reference method (G1P), rather than the SGP value, is generally   
     recommended.  For most analyses, the appropriate variable to use will      
     be G1P.  The value from the biochemistry profile (SGP) should not be       
     used routinely.  Consult the Laboratory Procedures Used for NHANES III     
     (U.S. DHHS, 1996) for details.                                             
                                                                                
                                                                                
SHP:  Spherocytosis                                                             
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
SIP:  Sickle cells                                                              
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
SSP:  Serum hepatitis B surface antibody                                        
                                                                                
     See note for HBP.                                                          
                                                                                
                                                                                
TGP:  Serum triglycerides                                                       
                                                                                
     Serum triglyceride levels were measured regardless of the examinee's       
     fasting status.  Mean serum triglycerides and the distribution of          
     serum triglycerides should be estimated only on examinees who did fast     
     at least nine hours, were examined in the morning, and were randomly       
     assigned to the morning fasting sample (WTPFHSD6 > 0).  For the            
     purpose of this calculation, the number of hours fasted was rounded to     
     the nearest whole integer.  Consult the Laboratory Procedures Used for     
     NHANES III (U.S. DHHS, 1996) for details.                                  
                                                                                
                                                                                
TOP:  Serum toxoplasmosis antibody                                              
                                                                                
     The presence and quantity of antibody to Toxoplasma gondii in the test     
     sample were determined by comparing the optical density of the test        
     sample to a standard curve.  A standard curve was constructed using        
     optical density readings from positive control sera obtained from a        
     kit; these readings were calibrated to WHO Toxo 60 serum and read as       
     International Units (IU/mL).  Those test samples exhibiting titer          
     below 7 IU/mL indicated a non-significant level of antibody according to   
                                                                               
     this technique; thus, they were considered to be negative, indicating no   
     infection.  Those test samples with results greater than 6 IU/mL were      
     considered to be positive, indicating infection at some undetermined       
     time.                                                                      
                                                                                
                                                                                
TRP:  Serum triglycerides                                                       
                                                                                
     This value was obtained from the standard battery of biochemical           
     assessments.  Use of the laboratory test result from the reference         
     method (TGP), rather than the TRP value, is generally recommended.         
     For most analyses, the appropriate variable to use is TGP.  The value      
     from the biochemistry profile (TRP) should not be used routinely.          
     Consult the Laboratory Procedures Used for NHANES III (U.S. DHHS, 1996)    
     for details.  Results for TRP were added to the protocol after NHANES      
     III began.  This result field was blank-filled for examinees who were      
     examined prior to the start of testing.                                    
                                                                                
                                                                                
TTP:  Target cells                                                              
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
TXP:  Toxic granulation                                                         
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
URP:  Urinary creatinine                                                        
                                                                                
     Although the laboratory method detection limit for urinary creatinine      
     is 1 mg/dL, all values below 10 mg/dL were considered "statistically       
     suspect" and were coded as "below level of detection".                     
                                                                                
                                                                                
VCP:  Serum vitamin C                                                           
                                                                                
     For NHANES III, serum concentrations of vitamin C were measured using      
     a total vitamin C, fully reduced method using high-performance liquid      
     chromatography with electrochemical detection (HPLC-EC) analysis.          
     This method differed from the  2,4-dinitrophenyl hydrazine colorimetric    
     method used in the NHANES II study.  A comparison study of the two         
     methods was carried out.  Linear regression analysis, by an error in       
     both variables' technique, was used to compare the results obtained by     
     the two methods; values for slope, intercept, and correlation              
     coefficient were 0.881, 0.036, and 0.927, respectively, for 138            
     singlet analyses.                                                          
                                                                                
     Serum concentrations obtained by HPLC-EC were lower than those             
     obtained by the 2,4-DNPH method.  This difference was expected due to      
     the increased specificity of the HPLC method.  Unlike colorimetric         
     methods, HPLC separates uric acid and other potential interferers from     
     ascorbate, thereby increasing accuracy and specificity.  The 2,4-DNPH      
     method also measured endogenous diketogulonate, the product of the         
     irreversible oxidation of dehydroascorbic acid.  This species was not      
     measured by most HPLC methods and generally was not included in total      
     vitamin C measurements since it has no vitamin C activity.  Because the    
     laboratory method differed between NHANES III and NHANES II, the results   
     from the two surveys are not comparable.                                   
                                                                                
                                                                               
     Blocks of vitamin C data are missing due to an inadvertent misdilution     
     of the ascorbic acid-serum ratio.                                          
                                                                                
                                                                                
VEP:  Serum vitamin E                                                           
                                                                                
     The vitamin E value of 9999 was confirmed.                                 
                                                                                
                                                                                
VRP:  Serum varicella antibody                                                  
                                                                                
     Varicella antibody data were reported as an optical density index.         
     See note RUP for the index calculation.  The equation used was:            
                                                                                
     O.D. index = (AG-NS)/Cut-off value                                         
                                                                                
     The cut-off value was 0.1.  An O.D. index equal to or greater than one     
     indicates the presence of antibody.                                        
                                                                                
                                                                                
VUP:  Vacuolated cells                                                          
                                                                                
     See note for ANP.                                                          
                                                                                
                                                                                
WCP:  White blood cell count                                                    
                                                                                
     See note for HGP and GRP.                                                  
                                                                                
                                                                               
Appendix 1.  Blood and Urine Assessments by Specimen Type and Age Group         
                                                                                
                       AGE GROUP                                                
                                                                                
1-3 years              4-5 years          6-11 years                            
                       Whole blood                                              
                                                                                
CBC (1)(5)             CBC (1) (5)        CBC (1) (5)                           
Differential smear     Differential       Differential                          
                        smear              smear                                
Lead (5)               Lead (5)           Lead (5)                              
Protoporphyrin (5)     Protoporphyrin (5) Protoporphyrin (5)                    
                       RBC folate         RBC folate                            
                       Glycated           Glycated                              
                       hemoglobin (5)     hemoglobin (5)                        
                                                                                
                       Serum                                                    
                                                                                
Iron (5)               Iron (5)           Iron (5)                              
TIBC (5)               TIBC (5)           TIBC (5)                              
Ferritin (5)           Ferritin (5)       Ferritin (5)                          
                       Folate (5)         Folate (5)                            
                       Apolipoprotein     Apolipoprotein                        
                        AI(4)(5)           AI(4)(5)                             
                       Apolipoprotein     Apolipoprotein                        
                        B(4)(5)            B(4)(5)                              
                       Cholesterol (5)    Cholesterol (5)                       
                       HDL/LDL (5)        HDL/LDL (5)                           
                       Triglycerides (5)  Triglycerides (5)                     
                       Lp(a)(2)(5)        Lp(a)(2)(5)                           
                       Cotinine (4)       Cotinine (4)                          
                       C-reactive         C-reactive                            
                        protein (5)        protein (5)                          
                       Vitamin A (5)      Vitamin A (5)                         
                       Carotenes (5)      Carotenes (5)                         
                       Retinyl esters (5) Retinyl esters (5)                    
                       Vitamin E (5)      Vitamin E (5)                         
                       Vitamin B12 (2)    Vitamin B12 (2)                       
                                          Helicobacter pylori (4)               
                       Tetanus            Tetanus                               
                                          Vitamin C                             
                                          Hepatitis A                           
                                                                                
                                                                               
Appendix 1.  Blood and Urine Assessments by Specimen Type and Age Group         
(continued)                                                                     
                                                                                
                       AGE GROUP                                                
                                                                                
1-3 years              4-5 years           6-11 years                           
                       Serum (continued)                                        
                                                                                
                                           Hepatitis B/delta                    
                                           Hepatitis C                          
                                           Hepatitis E                          
                                           Rubella (5)                          
                                           Varicella (5)                        
                                                                                
                       Urine                                                    
                                                                                
                                           Cadmium                              
                                           Creatinine                           
                                           Albumin                              
                                           Iodine                               
                                                                                
                                                                               
Appendix 1.  Blood and Urine Assessments by Specimen Type and Age Group         
(continued)                                                                     
                                                                                
                       AGE GROUP                                                
                                                                                
12-19 years                      20 years and older                             
                                                                                
                       Whole blood                                              
                                                                                
CBC (1)(5)                       CBC (1)(5)                                     
Differential smear               Differential smear                             
Lead (5)                         Lead (5)                                       
Protoporphyrin (5)               Protoporphyrin (5)                             
                                 RBC folate                                     
Glycated hemoglobin (5)          Glycated hemoglobin (5)                        
                                                                                
                       Serum                                                    
                                                                                
Iron (5)                         Iron (5)                                       
TIBC (5)                         TIBC (5)                                       
Ferritin (5)                     Ferritin (5)                                   
Folate (5)                       Folate (5)                                     
Apolipoprotein AI(4)(5)          Apolipoprotein AI(4)(5)                        
Apolipoprotein B(4)(5)           Apolipoprotein B(4)(5)                         
Cholesterol (5)                  Cholesterol (5)                                
HDL/LDL (5)                      HDL/LDL (5)                                    
Triglycerides (5)                Triglycerides (5)                              
Lp(a)(2)(5)                      Lp(a)(2)(5)                                    
Cotinine (4)                     Cotinine (4)                                   
C-reactive protein (5)           C-reactive protein (5)                         
                                 Rheumatoid factor (60+)                        
Vitamin A (5)                    Vitamin A (5)                                  
Carotenes (5)                    Carotenes (5)                                  
Retinyl esters (5)               Retinyl esters (5)                             
Vitamin E (5)                    Vitamin E (5)                                  
Vitamin B12 (2)                  Vitamin B12 (2)                                
Helicobacter pylori (4)                                                         
Tetanus                          Tetanus                                        
Vitamin C                        Vitamin C                                      
Hepatitis A                      Hepatitis A                                    
Hepatitis B/delta                Hepatitis B/delta                              
Hepatitis C                      Hepatitis C                                    
Hepatitis E                      Hepatitis E                                    
Rubella (5)                      Rubella (5)                                    
Varicella (5)                    Varicella (5)                                  
                                                                                
                                                                               
Appendix 1.  Blood and Urine Assessments by Specimen Type and Age Group         
(continued)                                                                     
                                                                                
                       AGE GROUP                                                
                                                                                
12-19 years                      20 years and older                             
                                                                                
                          Serum                                                 
                                                                                
Diphtheria                       Diptheria                                      
Herpes simplex I and II          Herpes simplex I and II                        
HIV I (ages 18+)(3)(5)           HIV I (ages 18+)(3)(5)                         
Toxoplasmosis (5)                Toxoplasmosis (5)                              
Vitamin D (OHD)                  Vitamin D (OHD)                                
Total/normalized calcium         Total/normalized calcium                       
Selenium (5)                     Selenium (5)                                   
Thyroxine (T4)                   Thyroxine (T4)                                 
Thyroid-stimulating hormone      Thyroid-stimulating hormone                    
Antithyroglobulin antibodies     Antithyroglobulin antibodies                   
Antimicrosomal antibodies        Antimicrosomal antibodies                      
                                 FSH/LH (females aged 35-60   years)            
                                 Insulin (6)                                    
                                 C-peptide (6)                                  
Biochemistry profile (5)         Biochemistry profile (5)                       
 Bicarbonate                      Bicarbonate                                   
 Blood urea nitrogen              Blood urea nitrogen                           
 Total bilirubin                  Total bilirubin                               
 Alkaline phosphatase             Alkaline phosphatase                          
 Cholesterol                      Cholesterol                                   
 AST                              AST                                           
 ALT                              ALT                                           
 LDH                              LDH                                           
 GGT                              GGT                                           
 Total protein                    Total protein                                 
 Albumin                          Albumin                                       
 Creatinine                       Creatinine                                    
 Glucose                          Glucose                                       
 Calcium                          Calcium                                       
 Chloride                         Chloride                                      
 Uric acid                        Uric acid                                     
 Phosphorus                       Phosphorus                                    
 Sodium                           Sodium                                        
 Potassium                        Potassium                                     
 Triglycerides                    Triglycerides                                 
 Globulin                         Globulin                                      
 Iron                             Iron                                          
 Osmolality                       Osmolality                                    
                                                                                
                                                                               
Appendix 1.  Blood and Urine Assessments by Specimen Type and Age Group         
                                 (continued)                                    
                                                                                
                       AGE GROUP                                                
                                                                                
12-19 years                      20 years and older                             
                                                                                
                       Plasma                                                   
                                                                                
                                 Glucose (examinees aged 20-39                  
                                  years and 75 years and older)                 
                                 OGTT (examinees aged 40-74                     
                                  years)                                        
                                 Fibrinogen (examinees aged 40                  
                                  years and older)(5)                           
                                                                                
                       Urine                                                    
                                                                                
Cadmium                          Cadmium                                        
Creatinine                       Creatinine                                     
Albumin                          Albumin                                        
Iodine                           Iodine                                         
Urine drug (ages 18              Urine drug (examinees aged 18                  
 years and over)(2)(3)            years and over)(2)(3)                         
 Cocaine                          Cocaine                                       
 Opiates                          Opiates                                       
 Phencyclidine                    Phencyclidine                                 
 Amphetamines                     Amphetamines                                  
 Marijuana                        Marijuana                                     
                                  Pregnancy test (females aged                  
                                   20-59 years)                                 
                                                                                
                       White Cells                                              
                                                                                
Storage/banking (5)              Storage/banking (5)                            
                                                                                
(1)  Includes hematocrit, hemoglobin, red, white and platelet cell counts,      
mean cell volume, mean cell hemoglobin, mean cell hemoglobin concentration,     
red cell distribution width, platelet distribution width, mean platelet         
volume, and 3-cell differential                                                 
(2)  Phase 2 only                                                               
(3)  Anonymous                                                                  
(4)  Phase 1 only                                                               
(5)  Home examination also                                                      
(6)  In phase 2, also from second venipuncture for examinees aged 40-74 years   
                                                                                
                                                                               
Appendix 2.  Laboratory Test Detection Limits                                   
                                                                                
Test                                  Detection limit                           
                                                                                
Albumin (urine)                       0.5 ug/mL                                 
Alpha carotene                        0 ug/dL                                   
Antimicrosomal antibody (AMA)         0.5 U/mL                                  
Antithyroglobulin antibody (ATA)      1.0 U/mL                                  
Beta carotene                         0.67 ug/dL                                
Beta cryptoxanthin                    0 ug/dL                                   
C-peptide                             0.03 pmol/mL                              
C-reactive protein                    0.3 mg/dL                                 
Cadmium (urine)                       0.01 ng/mL                                
Cotinine                              0.05 ng/mL                                
Creatinine (urine)                    1 mg/dL                                   
Erythrocyte protoporphyrin            2.5 ug/dL RBC                             
Ferritin                              3 ng/mL                                   
Folate (serum)                        0.2 ng/mL                                 
Follicle stimulating hormone (FSH)    0.15 IU/L                                 
Glucose                               2 mg/dL                                   
Glycated hemoglobin                   0 %                                       
Hematology parameters                                                           
 Granulocyte                          0 %                                       
 Granulocyte (1)                      0 number                                  
 Hematocrit                           0 %                                       
 Hemoglobin                           0 g/dL                                    
 Lymphocyte                           0 %                                       
 Lymphocyte (1)                       0 number                                  
 Mean cell hemoglobin                 0 pg                                      
 Mean cell hemoglobin                                                           
  concentration                       0 g/dL                                    
 Monocyte                             0 %                                       
 Monocyte    (1)                      0 number                                  
 Platelet count (1)                   0                                         
 Platelet distribution width          0 %                                       
 Red blood cell count (RBC) (1)       0                                         
 Red blood cell distribution width    0 %                                       
 White blood cell count (WBC) (1)     0                                         
Hepatitis profile                     Qualitative tests                         
Herpes                                Qualitative tests                         
High density lipoprotein (HDL)        10 mg/dL                                  
Human immunodeficiency virus (HIV)    Qualitative tests                         
Insulin                               2.5 uU/mL                                 
Iodine (urine)                        0.2 ug/dL                                 
Iron                                  3.0 ug/dL                                 
Lead                                  1 ug/dL                                   
Lipoprotein(a)                        0 mg/dL                                   
Lutein/zeaxanthin                     0.43 ug/dL                                
                                                                                
                                                                               
Appendix 2.  Laboratory Test Detection Limits (continued)                       
                                                                                
Test                                  Detection limit                           
                                                                                
Luteinizing hormone (LH)              0.15 IU/L                                 
Lycopene                              0.63 ug/dL                                
Normalized calcium                    0.5 mmol/L                                
RBC folate                            4.4 ng/mL                                 
Retinyl esters                        0 ug/dL                                   
Rheumatoid factor                     Qualitative tests                         
Rubella                               0 IU                                      
Selenium                              8 ng/mL                                   
Tetanus                               0 U/mL                                    
Thyroid stimulating hormone (TSH)     0.01 mU/mL                                
Thyroxine (T4)                        1.0 ug/dL                                 
Total iron binding capacity (TIBC)    9 ug/dL                                   
Total cholesterol                     10 mg/dL                                  
Total calcium                         1.5 mmol/L                                
Toxoplasmosis                         0 IU                                      
Triglycerides                         10 mg/dL                                  
Varicella                             0                                         
Vitamin B12                           20 pg/mL                                  
Vitamin E                             20 ug/dL                                  
Vitamin C                             0 mg/dL                                   
Vitamin A                             0.5 ug/dL                                 
Vitamin D                             5.0 ng/mL                                 
                                                                                
(1)  Units for white blood cell count, red blood cell count, platelet           
count, lymphocyte number, granulocyte number, and mononuclear number are        
referenced in the Manual for Medical Technicians p. 5-1 (U.S. DHHS, 1996).      
                                                                                
Note: Lower detection limits for analytes included in the general               
"biochemistry profile" are found in the Laboratory Procedures Used for          
NHANES III (U.S. DHHS, 1996).                                                   
                                                                                
                                                                               
Appendix 3.  NHANES III SI Table                                                
                                                                                
                    NHANES  NHANES    Conversion   SI     SI                    
Test (1)             Unit    Format     Factor     Unit  Format                 
                                                                                
Alanine                                                                         
 aminotransferase(2) N/A     N/A       N/A        U/L     XXX                   
Albumin (serum) (2)  g/dL    X.X       10         g/L     XX                    
Albumin (urine)      ug/mL   XXXXX.XX  N/A        N/A     N/A                   
Alkaline                                                                        
 phosphatase (2)     N/A     N/A       N/A        U/L     XXX                   
Alpha carotene       ug/dL   XXX       0.01863    umol/L  X.XX                  
Antimicrosomal                                                                  
 antibody            N/A     N/A       N/A        N/A     N/A                   
Antithyroglobulin                                                               
 antibody            N/A     N/A       N/A        N/A     N/A                   
Apolipoprotein AI    mg/dL   XXX       0.01       g/L     X.XX                  
Apolipoprotein B     mg/dL   XXX       0.01       g/L     X.XX                  
Aspartate amino-                                                                
 transferase (2)     N/A     N/A       N/A        U/L     XXX                   
Beta carotene        ug/dL   XXX       0.01863    umol/L  XX.XX                 
Beta cryptoxanthin   ug/dL   XXX       0.01809    umol/L  X.XX                  
Bicarbonate (2)      N/A     N/A       N/A        mmol/L  XX                    
Bilirubin (total)(2) mg/dL   XX.X      17.1       umol/L  XXX.XX                
Blood urea                                                                      
 nitrogen (2)        mg/dL   XXX       0.357      mmol/L  XX.XX                 
C-peptide            pmol/mL XX.XXX    1          nmol/L  XX.XXX                
C-reactive protein   N/A     N/A       N/A        N/A     N/A                   
Cadmium (urine)      ng/mL   XX.XX     8.897      nmol/L  XXX.XX                
Calcium (total)      N/A     N/A       N/A        mmol/L  X.XX                  
Calcium (normalized) N/A     N/A       N/A        mmol/L  X.XX                  
Calcium (2)          mg/dL   XX.X      0.25       mmol/L  X.XXX                 
Chloride (2)         N/A     N/A       N/A        mmol/L  XXX.X                 
Cholesterol          mg/dL   XXX       0.02586    mmol/L  XX.XX                 
Cholesterol (HDL)    mg/dL   XXX       0.02586    mmol/L  X.XX                  
Cholesterol (LDL)    mg/dL   XXX       0.02586    mmol/L  X.XX                  
Cholesterol (2)      mg/dL   XXX       0.02586    mmol/L  XX.XXX                
Cotinine             ng/mL   XXXX.XXX  N/A        N/A     N/A                   
Creatinine (2)       mg/dL   XX.X      88.4       umol/L  XXXX.X                
Creatinine (urine)   mg/dL   XXX.X     0.0884     mmol/L  XX.X                  
Diphtheria           N/A     N/A       N/A        N/A     N/A                   
Ferritin             ng/mL   XXXX      1          ug/L    XXXX                  
Fibrinogen           mg/dL   XXX       0.01       g/L     X.XX                  
Folate               ng/mL   XXX.X     2.266      nmol/L  XXX.X                 
Folate (RBC)         ng/mL   XXXX      2.266      nmol/L  XXXX.X                
Follicle-stimulating                                                            
 hormone             N/A     N/A       N/A        IU/L    XXX.X                 
GGT (2)              N/A     N/A       N/A        U/L     XXXX                  
                                                                                
                                                                               
Appendix 3.  NHANES III SI Table                                                
                                                                                
                    NHANES  NHANES   Conversion   SI      SI                    
Test (1)             Unit   Format     Factor     Unit   Format                 
                                                                                
Globulin (2)         g/dL   X.X        10         g/L     XX                    
Glucose (2)          mg/dL  XXX        0.05551    mmol/L  XX.XX                 
Glucose (plasma)     mg/dL  XXX.X      0.05551    mmol/L  XX.XXX                
Glycated                                                                        
 hemoglobin          %      XX.X       N/A        N/A     N/A                   
Helicobacter pylori  N/A    N/A        N/A        N/A     N/A                   
Hematocrit           %      XX.XX      0.01       L/L=1   0.XXX                 
Hemoglobin           g/dL   XX.XX      10         g/L     XXX.X                 
Hepatitis A virus    N/A    N/A        N/A        N/A     N/A                   
Hepatitis B core                                                                
 antibody (anti-HBc) N/A    N/A        N/A        N/A     N/A                   
Hepatitis B surface                                                             
 antigen (HbsAg)     N/A    N/A        N/A        N/A     N/A                   
Hepatitis C virus    N/A    N/A        N/A        N/A     N/A                   
Hepatitis D virus    N/A    N/A        N/A        N/A     N/A                   
Hepatitis B surface                                                             
 antibody (anti-HBs) N/A    N/A        N/A        N/A     N/A                   
Herpes I & II        N/A    N/A        N/A        N/A     N/A                   
Homocysteine         N/A    N/A        N/A        umol/L  XX.X                  
Human immuno-                                                                   
 deficiency virus    N/A    N/A        N/A        N/A     N/A                   
Insulin              uU/mL  XXX.XX     6.0        pmol/L  XXX.XX                
Iodine (urine)       ug/dL  XXX.X      N/A        N/A     N/A                   
Iron                 ug/dL  XXX        0.1791     umol/L  XX.XX                 
Iron (2)             ug/dL  XXX        0.1791     umol/L  XX.X                  
LDH (2)              N/A    N/A        N/A        U/L     XXX                   
Latex antibody       IU/mL  XXXX.XX    N/A        N/A     N/A                   
Lead                 ug/dL  XX.X       0.04826    umol/L  X.XXX                 
Lipoprotein(a)       mg/dL  XXX        0.01       g/L     X.XX                  
Lutein/zeaxanthin    ug/dL  XXX        0.01758    umol/L  X.XX                  
Luteinizing hormone  N/A    N/A        N/A        IU/L    XX.X                  
Lycopene             ug/dL  XXX        0.01863    umol/L  X.XX                  
Mean cell                                                                       
 hemoglobin          N/A    N/A        N/A        pg      XX.XX                 
Mean cell                                                                       
 volume              N/A    N/A        N/A        fL      XXX.XX                
Mean cell                                                                       
 hemoglobin                                                                     
 concentration       g/dL   XX.XX      10         g/L     XXX.X                 
Mean platelet                                                                   
 volume              N/A    N/A        N/A        fL      XX.XX                 
Methylmalonic acid   ug/dL  N/A        0.085      umol/L  N/A                   
                                                                                
                                                                               
Appendix 3.  NHANES III SI Table (continued)                                    
                                                                                
                    NHANES  NHANES  Conversion  SI       SI                     
Test (1)             Unit    Format   Factor    Unit    Format                  
                                                                                
Osmolality (2)       N/A    N/A       N/A      mmol/kg  XXX                     
Phosphorus (2)       mg/dL  XX.X      0.3229   mmol/L   X.XXX                   
Platelet count (3)   N/A    XXX.X     1        N/A      XXX.X                   
Potassium (2)        N/A    N/A       N/A      mmol/L   X.XX                    
Protein (total)(2)   g/dL   XX.X      10       g/L      XXX                     
Protoporphyrin       ug/dL  XXXX      0.0178   umol/L   XX.XX                   
Red blood cell                                                                  
 distribution width  %      XX.XX     0.01     fraction X.XXXX                  
Red blood cell                                                                  
 count (3)           N/A    X.XX      1        N/A      X.XX                    
Retinyl esters       ug/dL  XXX       0.03491  umol/L   X.XX                    
Rheumatoid factor    N/A    N/A       N/A      N/A      N/A                     
Rubella              N/A    N/A       N/A      N/A      N/A                     
Selenium             ng/mL  XXX       0.0127   nmol/L   X.XX                    
Sodium (2)           N/A    N/A       N/A      mmol/L   XXX.X                   
Tetanus              U/mL   N/A       N/A      N/A      N/A                     
Thyroid stimulating                                                             
 hormone             uU/mL  XXX.XX    1        mU/L     XXX.XX                  
Thyroxine            ug/dL  XX.X      12.87    nmol/L   XXX.X                   
Total iron binding                                                              
 capacity            ug/dL  XXX       0.1791   umol/L   XXX.XX                  
Toxoplasmosis        N/A    N/A       N/A      N/A      N/A                     
Triglycerides        mg/dL  XXXX      0.01129  mmol/L   XX.XX                   
Triglycerides (2)    mg/dL  XXXX      0.01129  mmol/L   XX.XXX                  
Uric acid (2)        mg/dL  XX.X      59.48    umol/L   XXX.X                   
Varicella            N/A    N/A       N/A      N/A      N/A                     
Vitamin A            ug/dL  XXX       0.03491  umol/L   X.XX                    
Vitamin B12          pg/mL  XXXXX     0.7378   pmol/L   XXXXX.XX                
Vitamin C            mg/dL  X.XX      56.78    mmol/L   XXX.XX                  
Vitamin D            ng/mL  XXX.X     2.496    nmol/L   XXX.X                   
Vitamin E            ug/dL  XXXX      0.02322  umol/L   XXX.XX                  
White blood cell                                                                
 count (3)           N/A    XX.XX     1        N/A      XX.XX                   
                                                                                
(1)  Results are based on a serum sample unless otherwise noted.                
(2)  Biochemistry profile                                                       
(3)  Units for white blood cell count, red blood cell count, platelet           
count, lymphocyte number, granulocyte number, and mononuclear number are        
referenced in the Manual for Medical Technicians p. 5-1 (U.S. DHHS, 1996).      
                                                                                
                                                                               
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