How to Download Data and Identify Supporting Documentation
Download SAS Transport Files
An NHANES analysis focusing solely on physical activity monitor measurements will include SAS transport files from 2 data categories:
- Demographic Data
- Examination Data
- PAXRAW – Physical Activity Monitor Examination File
Demographic data are linked to the physical activity monitor data by a common identifier, SEQN – the study participant’s identification number.
To build the “PAXMSTR” dataset for our sample SAS program, you will need to download demographic and physical activity monitor files from the 2003-2004 and 2005-2006 cycles. Remember that when creating a dataset for your own analysis, you need download only the data files relevant to that analysis.
From the NHANES homepage to the right: http://www.cdc.gov/nchs/nhanes.htm
- Click Questionnaires, Data Sets, and Related Documentation. From this page, click NHANES 2003-2004.
- Scroll down the page and click the Demographics link in the “Data, Documentation, Codebooks, SAS Code” section. Locate “Demographics Data, Docs, Questionnaire”. Right-click the Data link and select “Save Target As” to download and save the SAS transport file titled DEMO_C.
- Save the DEMO_C transport file to the C:\NHANES\DOWNLOAD directory created in Task 2, Step 1.
Note that file names for NHANES data include a single letter suffix, used to indicate the 2-year cycle in which the data were collected.
NHANES Data File Suffix | NHANES Cycle |
---|---|
A | 1999 to 2000 |
B |