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.
- Key Concepts about Keeping Data in NHANES II
- How to Keep Data in NHANES II
- Download Sample Code and Dataset
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.