The Interactive Diet and Activity Tracking in AARP (IDATA) Study is a methodologic study of device-based, internet-based, and conventional self-report instruments for assessing physical activity and diet in epidemiologic research. Scientists still have much to learn about the relationship between physical activity, diet, and disease. Limiting factors of current research are a lack of understanding about the measurement error properties of common assessment instruments and how to combine instruments to better measure food intake and physical activity participation. Instruments used by the IDATA Study include intensive 24-hour recalls of diet and time use, diaries, questionnaires, screeners, accelerometers, inclinometers, and urine biomarkers.
These data are available to all qualified investigators for studies of physical activity and nutrition, and interested investigators can request access to IDATA Study data via the Cancer Data Access System (CDAS).
CDAS provides extensive documentation for the IDATA Study, including a study summary and descriptions of the data collected. All IDATA Study requests are reviewed by NCI IDATA Study leadership. Upon approval, investigators will be granted access to the requested data for a limited period.