Differential accuracy of physical activity self-report by body mass index.
To examine whether agreement between self-reported and accelerometer-measured physical activity varies by BMI category in a low-income black sample.
Participants completed a questionnaire and wore an accelerometer for 4-6 days. Using one- and 10-minute bouts, accelerometers measured light, moderate, and vigorous physical activity time.
Correlations varied by obesity (nonobese: one-minute r=0.41; 10-minute r=0.47; obese: one-minute r=0.21; 10-minute r=0 .14). Agreement was highest among nonobese persons (one-minute kappa = 0.48, 10-minute kappa = 0.023; obese: one-minute kappa = -0.024, 10- minute kappa = -0.020).
We found compromised questionnaire performance among obese participants.
Warner, ET; Wolin, KY; Duncan, DT; Heil, DP; Askew, S; Bennett, GG
Volume / Issue
Start / End Page
Pubmed Central ID
Electronic International Standard Serial Number (EISSN)
International Standard Serial Number (ISSN)
Digital Object Identifier (DOI)