Variable codebooks for each of the five studies as well as for the aggregated data set can be viewed on-line or downloaded as portable document files (pdfs). Each file includes the following information:
- Variable names
- Variable labels
- Values labels (when applicable)
- Algorithms used to create computed variables
The codebooks are organized such that the order of the described variables corresponds to their order within the relevant data set. To access a particular codebook, click on the corresponding icon below. For information on downloading data files, see the Data Sharing Agreement page.