The following PLCO Questionnaires dataset(s) are available for delivery on CDAS. For each dataset, a Data Dictionary that describes the data is publicly available. In order to obtain the actual data in SAS or CSV format, you must begin a data-only request. Data will be delivered once the project is approved and data transfer agreements are completed.

The following Questionnaires data are available by request:

1. Baseline Questionnaire (BQ)
2. Dietary Questionnaire (DQX)
3. Diet History Questionnaire (DHQ)
4. Supplemental Questionnaire (SQX)
5. Medication Use Questionnaire (MUQ)
6. Brief Survey Questionnaire (BCQ)