Biostastics Final Project
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NHANESDataDocumentationdietandcholesterol.docxNHANES Data Documentation.
The NHANES III is a national survey that combines individual participant survey responses with laboratory data to better understand the health and nutritional status of adults and children in the United States. You can learn more about NHANES III at the Center of Disease Control website: http://www.cdc.gov/nchs/nhanes/about_nhanes.htm.
The survey is based on complex sampling design that oversamples members of specific subgroups of interest (e.g., elderly individuals), so any formal statistical analysis must utilize sampling weights and employ survey data analytic methods to produce valid results. We will ignore the sampling design and weights for this exercise, and assume that the data is a simple random sample drawn from the U.S. population.
CODEBOOK
Below is the description of the variables that you may have received in your dataset:
|
Variable |
Label |
Value |
Description |
|
ID |
Respondent ID number |
|
|
|
riagendr |
Gender |
1 |
Male |
|
|
|
2 |
Female |
|
ridageyr |
Age in years at screening |
|
Range of values |
|
ridreth1 |
Race/Hispanic origin |
1 |
Mexican American |
|
|
|
2 |
Other Hispanic |
|
|
|
3 |
Non-Hispanic White |
|
|
|
4 |
Non-Hispanic Black |
|
|
|
5 |
Other Race - Including Multi-Racial |
|
dmdeduc2 |
Education level - Adults 20+ |
1 |
Less than 9th grade |
|
|
|
2 |
9-11th grade (Includes 12th grade with no diploma) |
|
|
|
3 |
High school graduate/GED or equivalent |
|
|
|
4 |
Some college or AA degree |
|
|
|
5 |
College graduate or above |
|
indhhin2 |
Annual household income |
1 |
$ 0 to $ 4,999 |
|
|
|
2 |
$ 5,000 to $ 9,999 |
|
|
|
3 |
$10,000 to $14,999 |
|
|
|
4 |
$15,000 to $19,999 |
|
|
|
5 |
$20,000 to $24,999 |
|
|
|
6 |
$25,000 to $34,999 |
|
|
|
7 |
$35,000 to $44,999 |
|
|
|
8 |
$45,000 to $54,999 |
|
|
|
9 |
$55,000 to $64,999 |
|
|
|
10 |
$65,000 to $74,999 |
|
|
|
12 |
$20,000 and Over |
|
|
|
13 |
Under $20,000 |
|
|
|
14 |
$75,000 to $99,999 |
|
|
|
15 |
$100,000 and Over |
|
dbq700 |
How healthy is the diet |
1 |
Excellent |
|
|
|
2 |
Very good |
|
|
|
3 |
Good |
|
|
|
4 |
Fair |
|
|
|
5 |
Poor |
|
dsdcount |
Total # of Dietary Supplements Taken |
|
Range of values |
|
lbxtc |
Total Cholesterol( mg/dL) |
|
Range of values |
|
pyramid |
Heard of MyPyramid/Food Pyramid |
1 |
Yes |
|
|
|
2 |
No |
|
dr1tkcal |
Total energy(Kcal) intake in 24hrs |
|
Range of values |
|
dr1tprot |
Total protein(gm) intake in 24hrs |
|
Range of values |
|
dr1tcarb |
Total carbohydrate (gm) intake in 24hrs |
|
Range of values |
|
dr1tsugr |
Total sugar(gm) intake in 24hrs |
|
Range of values |
|
dr1tfibe |
Total dietary fiber(gm) intake in 24hrs |
|
Range of values |
|
dr1ttfat |
Total fat(gm) intake in 24hrs |
|
Range of values |
