Validity and bias on the online active Australia survey: activity level and participant factors associated with self-report bias

Background This study examined the criterion validity of the online Active Australia Survey, using accelerometry as the criterion, and whether self-report bias was related to level of activity, age, sex, education, body mass index and health-related quality of life. Methods The online Active Australia Survey was validated against the GENEActiv accelerometer as a direct measure of activity. Participants ( n = 344) wore an accelerometer for 7...