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The Brief Survey Questionnaire (BCQ) was administered in 2017 and 2018 in participants in both arms of the trial. Data includes smoking history, weight, height, BMI, weight loss, physical activity, health history, cancer screening, and gender-specific details. To learn more about the Brief Survey Questionnaire (BCQ) data collected as part of the study, visit the PLCO Brief Survey (BCQ) documentation page.

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.

User Guides and Other Files

User Guides are intended to serve as a guide to using the data contained in these datasets.

PLCO User Guide
(PDF - 394.1 KB)
For Brief Survey Questionnaire (BCQ) Data:
Data Dictionary
(PDF - 169.3 KB)

Data-Collection Forms

The following forms were used to collect data that is now available in the datasets listed above. They are provided in PDF format.

Brief Survey Questionnaire