An NHANES II dataset for analysis will typically include data from at least two data files. You will need to keep and merge data to include variables from different data files.
NHANES II data files were released by their collection method or component. Many of these are very large data files with many variables. Most analysts will only need a few selected variables. You will likely wish to keep only those variables when you create your analytic dataset. This process uses a SAS option statement called keep.
The NHANES II data files are organized by collection method or component, such as Physician's Examination or Hematology and Biochemistry. Joining the components of the data files uses a SAS statement called merge.
National Center for Health
Statistics
3311 Toledo Road
Hyattsville, MD 20782
Phone: 1-866-441-NCHS (6247)
For data inquiries, use
nchsquery@cdc.gov
Problems or comments about the Tutorial?
Email the Tutorial Team: NHANESWebTutorial@cdc.gov
Centers for Disease Control and Prevention, 1600 Clifton Rd, Atlanta, GA 30333, U.S.A
Tel: (404) 639-3311 / Public Inquiries: (404) 639-3534 / (800) 311-3435