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The following items indicate discrepancies found after the release of the Third National Health and Nutrition Examination Survey (NHANES III) CD-ROM in 1997. This affects both the NHANES III SETS and ASCII CD-ROMs.
| File Location: | Exam |
| Section: | BM - Body Measurements |
| Item Name: | BMPRECUM |
| Description: | Additional Note to be added to explain discrepancy of some measurements in BMPRECUM due to technician error. |
| BMPRECUM: | This additonal note documents incorrect or highly unusual data values that were determined for this variable. Analysts may wish to correct or be aware of these measurements. The sequence number and current value in the data file are given below. To correct these, 23.1 should be subtracted from each of the values shown below for BMPRECUM. |
| Sequence No. | BMPRECUM |
| 17350 | 83.6 |
| 1936 | 81.1 |
| 18423 | 88.1 |
| 6939 | 94.6 |
| *7778 | 87.6 |
| 1133 | 90.6 |
| 15844 | 102.3 |
| 1768 | 106.1 |
| 13630 | 108.7 |
| 13510 | 105.6 |
| 3327 | 104.1 |
| 6672 | 106.1 |
| 8517 | 115.3 |
| 20377 | 117.1 |
| 13749 | 115.6 |
| 18556 | 119.5 |
| *This record was found to be correct on July 24, 1997, after the CD-ROM had already been released. Do NOT subtract 23.1 from this record. | |
| File Location: | Exam |
| Section: | MA - Mec Adult Questionnaire |
| Item Name: | MAPF32S |
| Description: | SAS label for this variable incorrectly states the question as "How many days ago stop taking BC pills." Correct wording for SAS label is "How many months ago stop taking BC pills." Code book is correct. Data is correct. Index reflects incorrect SAS label. |
| File Location: | Adult |
| Section: | Documentation - Index of Variables |
| Description: |
An unknown error occurred when creating the Index of Variables in the documentation. The index specifies incorrect positions for a subset of variables and leaves out some variable names. The data is correct and the codebook correctly describes all data items and positions in the file. Use the codebook when referencing data positions and item names in the ADULT file. A corrected copy of the Documentation Index of Variables is available on request by contacting the Information Dissemination Staff, 3311 Toledo Road, Hyattsville, Maryland 20782 (301) 436-8500. |
| File Location |
Exam |
| Section: | Body Measurements |
| Item Name: | BMPBMI |
| Description: | Additional note to be added to explain discrepancy between BMI calculated from variables BMPWT and BMPHT (BMPBMI=BMPWT/BMPHT**2) vs. use of BMI from the pre-calculated BMPBMI variable on the file. |
| BMPBMI | This note documents incorrect data values for the BMPBMI variable that do not satisfy the equation BMI=weight/height**2. Analysts may wish to correct or be aware of these incorrect values. Another alternative is to simply disregard the BMPBMI variable and calculate the actual BMI (BMI=BMPWT/BMPHT**2) for BMI analysis. Discrepancies arose as the result of final edits made to the BMPWT and/or BMPHT variables for selected subjects, and failing to then recalculate BMPBMI for these subjects prior to release of the public-use data file. |
| Sequence No. | BMPBMI | Actual BMI |
| 8769 | 12.2 | 14.5 |
| 9967 | 17.2 | 12.3 |
| 13106 | 24.7 | 18.4 |
| 19083 | 12.2 | 14.3 |
| 21348 | 41.5 | 33.4 |
| 37200 | 42.4 | 29.8 |
| 37451 | 20.3 | 27.0 |
| 44949 | 15.8 | 19.9 |
| 48587 | 12.5 | 16.5 |
| 49438 | 16.2 | 16.3 |
| 53487 | 16.5 | 24.7 |
| 53510 | 15.5 | 23.5 |
| File Location: | Exam |
| Section: | MA - MEC Adult Questionnaire |
| Item Name: | MAPF12R |
| Description: |
Note lists incorrect ages for administration of question. Corrected note text follows. |
| MAPF12R: | Pregnancy
status recode This variable combines responses from self-reported pregnancy status (F12) with the results of urine pregnancy test conducted in the mobile examination center on women 17-49 years of age. If either the self-report or the test result was positive, then MAPF12R was coded yes. Otherwise, if either the self-report or test result was negative, then MAPF12R was coded no. If the self-report was don't know and the test result was either inconclusive or blank but applicable, then MAPF12R was coded don't know. If the self-report was blank but applicable and the test result was inconclusive, then MAPF12R was also coded don't know. Finally, if both responses were blank but applicable, then MAPF12R was coded blank but applicable. |
If, when running a frequency on your variables you notice fill values not specified in the documentation, for instance a 9998, the SAS engine you are running may be different from that used to generate the SAS input statements. The problem may be corrected by increasing the SAS length by 1 for that variable.
For instance hyaitmo may appear to have a fill value of 9998.
Use the SAS length statement to
increase the length from 3 to 4 in the SAS dataset:
length hyaitmo 4;
the data on the
ASCII ROM is accurate.
The following variables may be affected:
| Variable | File Location |
| HYAITMO | Exam, Lab, Youth |
| HXPH21S | Exam |
| MAPF51 | Exam |
| MAPF54R | Exam |
| MAPF55 | Adult |
| HAB6S | Adult |
| HAD9S | Adult |
| HAS12S | Adult |
| HAT1S | Adult |
| HAT3S | Adult |
| HAT5S | Adult |
| HAT7S | Adult |
| HAT9S | Adult |
| HAT11S | Adult |
| HAT13S | Adult |
| HAT15S | Adult |
| HAT17S | Adult |
| HAT20S | Adult |
| HAT22S | Adult |
| HAT24S | Adult |
| HAT26S | Adult |
| HAV1S | Adult |
| HAV4S | Adult |
| HAV6S | Adult |
| HAV7R | Adult |
Contacts Technical questions about
the file contact: |
This page last reviewed
July 24, 2008
|
