The Third National Health and Nutrition Examination Survey (NHANES III),
1988-94, Series 11, No. 17A (Hip Bone Geometry) Data Release.


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.

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.

This data release, Series 11 No. 17A, contains the NHANES III Hip Bone Geometry
data file and documentation.  This data release does not replace the previous 
NHANES III data releases. The released data is in flat text format.  A SAS 
program is provided to read the flat data. The user is advised to have someone 
familiar with SAS data step adapt the provided SAS program to his or her 
specific SAS environment.

The following table summarizes the NHANES III data releases which are currently
available.

Table 1.  Available NHANES III Data
+----------------------+--------+---------+------------------------------------+
|Data Release Number   |Release |Size in  |Data Files / Description            |
|                      |Date    |Megabytes|                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |June    |   0.04  |Hip Bone Geometry data file and     |
|Series 11, No. 17A,   |2003    |         |documentation                       |
|ASCII Version (This   |        |         |                                    |
|release)              |        |         |                                    | 
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |August  |   0.4   |Diphtheria antibody (IU/ml) data    |
|Series 11, No. 16A,   |2002    |         |file and documentation              |
|ASCII Version (This   |        |         |                                    |
|release)              |        |         |                                    | 
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |August  |   0.2   |Antibody to measles data file and   |
|Series 11, No. 15A,   |2002    |         |documentation                       |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |June    |   0.2   |Antibody to human Papillomavirus-16 |
|Series 11, No. 14A,   |2002    |         |data file and documentation         |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |March   |   0.5   |Dental Pathogen data file           |
|Series 11, No. 13A,   |2002    |         |and documentation                   |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |January |   0.2   |Serum leptin data file and          |
|Series 11, No. 12A,   |2002    |         |documentation                       |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |October |   0.2   |Knee osteoarthritis X-ray data file |
|Series 11, No. 11A,   |2001    |         |and documentation                   |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |October |   0.2   |Hepatitis C virus genotype data     |
|Series 11, No. 10A,   |2001    |         |file and documentation              |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |June    |  240    |Raw spirometry data file and        |
|Series 11, No. 9A,    |2001    |         |documentation                       |
|ASCII Version         |        |         |                                    |
+----------------------+------ -+---------+------------------------------------+
|NHANES III, 1988-94,  |TBA     |   9.7   |Natality data file and              |
|Series 11, No. 8A,    |        |         |documentation                       |
|ASCII Version         |        |         |                                    |
+----------------------+------ -+---------+------------------------------------+
|NHANES III, 1988-94,  |June    |  78.8   |Multiply Imputed Data Files and     |
|Multiply Imputed Data |2001    |         |reports                             |
|Set, Series 11, No.   |        |         |                                    |
|7A, ASCII version     |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |January |   2.7   |Healthy Eating Index (HEI) Data File|
|Series 11, No. 6A,    |2000    |         |and documentation includes number   |
|ASCII Version         |        |         |of servings by Food Guide Pyramid   |
|                      |        |         |food groups and HEI                 |
|----------------------|--------|---------|------------------------------------+
|NHANES III, 1988-94,  |April   |   54    |Supplemental Nutrition Survey of    |
|Series 11, No. 5A,    |2000    |         |older Americans (SNS)contains       |
|ASCII Version         |        |         |subsets of individual foods         |
|                      |        |         |and total nutrients intake data     |
|                      |        |         |files and documentation             |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |Septem- |    0.5  |Priority toxicant reference range   |
|Series 11, No. 4A,    |ber 2000|         |study data file and documentation   |
|ASCII Version         |        |         |                                    |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |July    |   33    |Second exam sample files for        |
|Series 11, No. 3A,    |1999    |         |dietary recall, examination,        |
|ASCII Version         |        |         |laboratory, additional laboratory   |
|                      |        |         |analytes and documentation          |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |April   |  407    |Dietary recall (replacement),       |
|Series 11, No. 2A,    |1998    |         |electrocardiography, laboratory     |
|ASCII Version         |        |         |(additional analytes), and          |
|                      |        |         |vitamins/medicines data files and   |
|                      |        |         |documentation                       |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |October |  285    |Adult and youth household           |
|Series 11, No. 1,     |1997    |         |questionnaire, examination, and     |
|Revised SETS Version  |        |         |laboratory data files and           |
|1.22a                 |        |         |documentation, plan and operation,  |
|                      |        |         |analytic and reporting guidelines,  |
|                      |        |         |weighting and estimation            |
|                      |        |         |methodology, field operations,      |
|                      |        |         |non-response bias                   |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |July    |  454    |Adult and youth household           |
|Series 11, No. 1A,    |1997    |         |questionnaire, dietary recall,      |
|ASCII Version         |        |         |examination, and laboratory data    |
|                      |        |         |files and documentation             |
+----------------------+--------+---------+------------------------------------+
|NHANES III, 1988-94,  |July    |  285    |Adult and youth household           |
|Series 11, No. 1,     |1997    |         |questionnaire, examination, and     |
|SETS Version 1.22a *  |        |         |laboratory data files and           |
|                      |        |         |documentation                       |
+----------------------+--------+---------+------------------------------------+
|NHANES III Reference  |October |  152    |Plan and operation, analytic and    |
|Manuals and Reports   |1996    |         |reporting guidelines, weighting and |
|October 1996          |        |         |estimation methodology, field       |
|                      |        |         |operations, non-response bias       |
+----------------------+--------+---------+------------------------------------+

*    Do not use this CD-ROM. It had technical problems and has been
     superseded by the revised SETS version 1.22a, Series 11, No. 1,
     released in October 1997.

The first release of NHANES III data is available on three different CD-ROMs.
The first CD-ROM, Series 11, No. 1 SETS Version 1.22a contains data accessible
through the Statistical Export and Tabulation System (SETS) retrieval software
as well as documentation.  This CD-ROM had technical problems and should not
be used; it has been superseded by the Series 11, No. 1 Revised SETS Version
1.22a.  This revised CD-ROM includes corrections to the SETS software and also
contains the NHANES III Reference Manuals and Reports.  A third CD-ROM, Series
11, No. 1A, contains the same data and documentation (except the Reference
Manuals and Reports) as on the Series 11, No. 1 Revised Sets Version 1.22a
CD-ROM plus the expanded dietary recall data and documentation. All data on
the Series 11, No. 1A CD-ROM are in ASCII format only. Series 11, No. 1A and 
later releases (Series 11, No. 2A, Series 11, No. 3A, etc.) are also available 
at http://www.cdc.gov/nchs/about/major/nhanes/nh3data.htm.

Background information on the procedures, survey components, questionnaires,
examination and laboratory methods, and statistical analysis guidelines is
available on the NHANES III Reference Manuals and Reports (CD-ROM and at
http://www.cdc.gov/nchs/about/major/nhanes/nhanes3/cdrom/main.pdf).  All data 
users are strongly encouraged to review these reference materials and reports 
before analyzing NHANES III data.

Guidelines for Data Users

o    NHANES III survey design and demographic variables are found on the
     Household Adult Data File, Household Youth Data File, the Laboratory
     Data File and the Examination Data File.  In preparing a data set
     for analysis, other data files should be merged with either or both
     of the Adult Household Data File or the Youth Household Data File
     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, the
     Prescription Medication Data File, and The Vitamin and Minerals Data File
     all have 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 the file documentation 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 available or released to the
     public.  Additionally, some variables have been recoded to 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
     or 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.  Do not use
     the Phase 1 provisional release; use the current (six-year) release.

o    Although the data files have been edited carefully, it is possible that
     errors may still exist.  Please notify NCHS staff (301-458-4636) of any
     suspected errors in the data file or the documentation.  Refer to the
     NCHS website at http://www.cdc.gov/nchs/about/major/nhanes/nh3data.htm for 
     updates to these data files.

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 this Hip Bone Geometry Data File in 
     this release 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 Hip Bone Geometry
     data file (Series 11, No. 17A). Hyattsville, MD: Centers for 
     Disease Control and Prevention, 2003.

Problems Using the Data

NHANES III is a wonderfully rich source of data and NCHS encourages you to use
the data for research and analysis.  However, the dataset is large and complex
and familiarity with data file manipulation and analysis is required.  NCHS 
does not have the resources to perform analyses, check results, debug
programs or do literature review for your work.  Thorough review of the
extensive documentation on the planning of the survey, analytic guidelines and
individual datasets should resolve most questions.  If you still have questions
after careful review of the documentation, please contact the Data Dissemination
Branch at (301)458-4636.

--------------------------------------------------------------------------------
Hip Geometry Document


DXA scans were originally collected in NHANES III in order to obtain bone mineral
density data.  However, after the completion of the survey, a program to reprocess
DXA scans for hip geometry became available (see Hip Structural Analysis (HSA) 
Program description).  Only sample persons with technically acceptable DXA scans
for bone mineral density were eligible for hip geometry measurements. 

For more information about the sample with DXA scans,
see the following variables in the NHANES III Examination File Dataset:

a)  BDPTECH:  	examiner who performed the DXA scan in the
                mobile exam center
b)  BDPEXFLR:   flag for exclusion by protocol for DXA scans
c)  BDPSCAN:    technical acceptability of scan for bone
                density after review at Mayo Clinic
d)  BDPSIDE:	hip side that was scanned

For more information about quality control for the DXA scans, see:

Wahner HW, Looker A, Dunn W, Hauser M, Walters L, Novak C. 
Quality control of bone densitometry in a national health survey (NHANES III)
using three mobile examination centers. J Bone Mineral Research 1994;9:951-60. 

Acceptable bone mineral measurements were obtained on 14,646 men and women
ages 20 years and older in NHANES III.  However, structural analysis for 
hip geometry was not possible for 1,031 of the 14,646 scans with acceptable 
data for the bone mineral analysis.  Reasons for exclusion of these scans 
from the structural analysis were:  obscured femoral neck margins, 
incomplete (cut-off) scans, osteoarthritic growths, metal artifacts,
prosthetics or calcifications, and excessive anteversion. 
The total number of DXA scans analyzed for hip geometry was 13,615.  

For more information, see: 

Beck TJ, Looker AC, Ruff CB, Sievanen H, Wahner HW. 
Structural trends in the aging femoral neck and proximal shaft: 
analysis of NHANES III DXA data.  J Bone Mineral Research 2000:15:2297-2304

--------------------------------------------------------------------------------
                                                                                
                 NHANES III Bone Hip Geometry  Data File  Index                 
                                                                                
    ------------------------------------------------------------------------    
                                                   Variable                     
    Description                                    Name         Positions       
    ------------------------------------------------------------------------    
                                                                                
    Respondent identification number ............  SEQN                 1-5     
    Acceptable or rejected scan .................  BDPSCAN                6     
    Hologic femur neck width-cm .................  BGPFNWID            7-10     
    Femur neck shaft angle-degrees ..............  BGPNSA             11-15     
    Femur neck length-cm ........................  BGPNLENG           16-19     
    Hip axis length-cm ..........................  BGPHAL             20-24     
    NN bone mineral density-gm/cm sq ............  BGPNNBMD           25-29     
    NN Cross sect area-cm sq ....................  BGPNNCSA           30-34     
    NN Cross sect mom inertia-cm4 ...............  BGPNNCSM           35-40     
    NN width-cm .................................  BGPNNWID           41-44     
    NN endocortical diameter-cm .................  BGPNNED            45-49     
    NN cortical thickness-cm ....................  BGPNNCT            50-54     
    NN profile ctr distance-cm ..................  BGPNNDIS           55-58     
    NN center mass position-dimensionless .......  BGPNNCTR           59-63     
    NN section modulus-cm3 ......................  BGPNNZ             64-68     
    NN buckling ratio ...........................  BGPNNBR            69-74     
    IT bone mineral density-gm/cm sq ............  BGPITBMD           75-79     
    IT Cross sect area-cm sq ....................  BGPITCSA           80-85     
    IT Cross sect mom inertia-cm4 ...............  BGPITCSM           86-91     
    IT width-cm .................................  BGPITWID           92-95     
    IT endocortical diameter-cm .................  BGPITED           96-100     
    IT cortical thickness-cm ....................  BGPITCT          101-105     
    IT profile ctr distance-cm ..................  BGPITDIS         106-109     
    IT center mass position-dimensionless .......  BGPITCTR         110-114     
    IT section modulus-cm3 ......................  BGPITZ           115-120     
    IT buckling ratio ...........................  BGPITBR          121-126     
    FS bone mineral density-gm/cm sq ............  BGPFSBMD         127-131     
    FS Cross sect area-cm sq ....................  BGPFSCSA         132-136     
    FS Cross sect mom inertia-cm4 ...............  BGPFSCSM         137-142     
    FS width-cm .................................  BGPFSWID         143-146     
    FS endocortical diameter-cm .................  BGPFSED          147-151     
    FS cortical thickness-cm ....................  BGPFSCT          152-156     
    FS profile ctr distance-cm ..................  BGPFSDIS         157-160     
    FS center mass position-dimensionless .......  BGPFSCTR         161-165     
    FS section modulus-cm3 ......................  BGPFSZ           166-170     
    FS buckling ratio ...........................  BGPFSBR          171-176     
------------------------------------------------------------------------   
                                                                                
                                                                                
                    NHANES III Bone Hip Geometry  Data File                     
                                                                                
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
          1-5              Sequence number                                      
      SEQN         16416   00003-53616                                          
                                                                                
            6              Bone Density Scan Technically Acceptable:            
      BDPSCAN      14646   1     Yes                                            
                     321   2     No                                             
                    1449   8     Blank but applicable                           
                                                                                
          7-10             Hologic Femur Neck Width (cm)                        
      BGPFNWID     13615   1.37-5.17                                            
                    2801   8888  Blank but applicable                           
                                                                                
         11-15             Femur Neck Shaft Angle(degrees)                      
      BGPNSA       13615   112.1-00156                                          
                    2801   88888 Blank but applicable                           
                                                                                
         16-19             Femur Neck Length (cm)                               
      BGPNLENG     13615   2.45-7.95                                            
                    2801   8888  Blank but applicable                           
                                                                                
         20-24             Hip Axis Length (cm)                                 
      BGPHAL       12991   08.07-16.63                                          
                    3425   88888 Blank but applicable                           
                                                                                
         25-29             Femur Narrow Neck                                    
      BGPNNBMD             Bone Mineral Density (g/cm2)                         
                   13586   0.368-2.045                                          
                    2830   88888 Blank but applicable                           
                                                                                
         30-34             Femur Narrow Neck                                    
      BGPNNCSA             Cross Sectional Area (cm2)                           
                   13586   1.053-7.605                                          
                    2830   88888 Blank but applicable                           
                                                                                
         35-40             Femur Narrow Neck                                    
      BGPNNCSM             Cross Sectional Moment of Inertia (cm4)              
                   13586   00.663-15.613                                        
                    2830   888888  Blank but applicable                         
                                                                                

                                                                               
                                                                                
                    NHANES III Bone Hip Geometry  Data File                     
                                                                                
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         41-44             Femur Narrow Neck                                    
      BGPNNWID             Subperiosteal Width (cm)                             
                   13586   0002-5.01                                            
                    2830   8888  Blank but applicable                           
                                                                                
         45-49             Femur Narrow Neck                                    
      BGPNNED              Endocotical Diameter (cm)                            
                   13586   1.594-4.599                                          
                    2830   88888 Blank but applicable                           
                                                                                
         50-54             Femur Narrow Neck                                    
      BGPNNCT              Average Cortical Thickness (cm)                      
                   13586   0.068-0.429                                          
                    2830   88888 Blank but applicable                           
                                                                                
         55-58             Femur Narrow Neck                                    
      BGPNNDIS             Profile center distance (cm)                         
                   13586   1.01-2.64                                            
                    2830   8888  Blank but applicable                           
                                                                                
         59-63             Femur Narrow Neck                                    
      BGPNNCTR             Center of Mass Position (dimensionless)              
                   13586   0.395-0.625                                          
                    2830   88888 Blank but applicable                           
                                                                                
         64-68             Femur Narrow Neck                                    
      BGPNNZ               Section Modulus (cm3)                                
                   13586   0.491-5.914                                          
                    2830   88888 Blank but applicable                           
                                                                                
         69-74             Femur Narrow Neck                                    
      BGPNNBR              Buckling Ratio                                       
                   13586   03.879-32.601                                        
                    2830   888888  Blank but applicable                         
                                                                                

                                                                               
                                                                                
                    NHANES III Bone Hip Geometry  Data File                     
                                                                                
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
         75-79             Femur Intertrochanter                                
      BGPITBMD             Bone Mineral Density (g/cm2)                         
                   13615   0.359-2.098                                          
                    2801   88888 Blank but applicable                           
                                                                                
         80-85             Femur Intertrochanter                                
      BGPITCSA             Cross Sectional Area (cm2)                           
                   13615   01.716-10.842                                        
                    2801   888888  Blank but applicable                         
                                                                                
         86-91             Femur Intertrochanter                                
      BGPITCSM             Cross Sectional Moment of Inertia (cm4)              
                   13615   03.185-41.808                                        
                    2801   888888  Blank but applicable                         
                                                                                
         92-95             Femur Intertrochanter                                
      BGPITWID             Subperosteal Width (cm)                              
                   13615   4.01-7.68                                            
                    2801   8888  Blank but applicable                           
                                                                                
         96-100            Femur Intertrochanter                                
      BGPITED              Endocortical Diameter (cm)                           
                   13615   003.1-7.022                                          
                    2801   88888 Blank but applicable                           
                                                                                
        101-105            Femur Intertrochanter                                
      BGPITCT              Average Cordial Thickness (cm)                       
                   13615   0.124-0.855                                          
                    2801   88888 Blank but applicable                           
                                                                                
        106-109            Femur Intertrochanter                                
      BGPITDIS             Profile center distance (cm)                         
                   13615   1.78-3.77                                            
                    2801   8888  Blank but applicable                           
                                                                                

                                                                               
                                                                                
                    NHANES III Bone Hip Geometry  Data File                     
                                                                                
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        110-114            Femur Intertrochanter                                
      BGPITCTR             Center of Mass Position (dimensionless)              
                   13615   0.374-0.533                                          
                    2801   88888 Blank but applicable                           
                                                                                
        115-120            Femur Intertrochanter                                
      BGPITZ               Section Modulus (cm3)                                
                   13615   01.349-11.179                                        
                    2801   888888  Blank but applicable                         
                                                                                
        121-126            Femur Intertrochanter                                
      BGPITBR              Buckling ratio                                       
                   13615   03.076-29.154                                        
                    2801   888888  Blank but applicable                         
                                                                                
        127-131            Femur Shaft                                          
      BGPFSBMD             Bone Mineral Density (g/cm2)                         
                   13615   0.529-2.771                                          
                    2801   88888 Blank but applicable                           
                                                                                
        132-136            Femur Shaft                                          
      BGPFSCSA             Cross Sectional Area (cm2)                           
                   13615   1.599-9.737                                          
                    2801   88888 Blank but applicable                           
                                                                                
        137-142            Femur Shaft                                          
      BGPFSCSM             Cross Sectional Moment of Inertia (cm4)              
                   13615   01.287-16.107                                        
                    2801   888888  Blank but applicable                         
                                                                                
        143-146            Femur Shaft                                          
      BGPFSWID             Width (cm)                                           
                   13615   2.17-5.08                                            
                    2801   8888  Blank but applicable                           
                                                                                

                                                                               
                                                                                
                    NHANES III Bone Hip Geometry  Data File                     
                                                                                
    ------------------------------------------------------------------------    
    Positions            Item description                                       
    SAS name    Counts       and code                               Notes       
    ------------------------------------------------------------------------    
                                                                                
        147-151            Femur Shaft                                          
      BGPFSED              Endocortical Diameter (cm)                           
                   13615   0.375-4.303                                          
                    2801   88888 Blank but applicable                           
                                                                                
        152-156            Femur Shaft                                          
      BGPFSCT              Average Cortical Thickness (cm)                      
                   13615   0.168-1.293                                          
                    2801   88888 Blank but applicable                           
                                                                                
        157-160            Femur Shaft                                          
      BGPFSDIS             Profile center distance (cm)                         
                   13613   1.13-2.61                                            
                    2803   8888  Blank but applicable                           
                                                                                
        161-165            Femur Shaft                                          
      BGPFSCTR             Center of Mass Position (dimensionless)              
                   13613   0.404-0.571                                          
                    2803   88888 Blank but applicable                           
                                                                                
        166-170            Femur Shaft                                          
      BGPFSZ               Section Modulus (cm3)                                
                   13613   0.931-6.943                                          
                    2803   88888 Blank but applicable                           
                                                                                
        171-176            Femur Shaft                                          
      BGPFSBR              Buckling ratio                                       
                   13613   01.245-13.076                                        
                    2803   888888  Blank but applicable