There were potentially five questionnaires a participant could have completed around the time he/she entered the trial: the Baseline Questionnaire, the Supplemental Questionnaire, the Dietary Questionnaire, the Diet History Questionnaire and the Medication Use Questionnaire.
Medication Use (MUQ)
The Medication Use Questionnaire (MUQ) was administered in 2013. The questionnaire primarily asked participants about medication use. Participants were asked to provide information on aspirin, acetaminophen, and nonsteroidal anti-inflammatory drug (NSAID) use in the 12 months prior to form completion, and to list all prescription medications taken within 30 days of form completion. The MUQ also asked participants to provide their current weight and smoking status, and asked for consent to collect participants' Medicare data.
Approximately 59,000 MUQ questionnaires were collected. The median time for MUQ completion was 16 years into the trial.
MUQ data can be obtained in the Medication Use Questionnaire datasets.