Differential accuracy of physical activity self-report by body mass index

Erica T. Warner, Kathleen Y. Wolin, Dustin T. Duncan, Daniel P. Heil, Sandy Askew, Gary G. Bennett

Research output: Contribution to journalArticlepeer-review


Objectives: To examine whether agreement between self-reported and accelerometer-measured physical activity varies by BMI category in a low-income black sample. Methods: 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. Results: 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). Conclusions: We found compromised questionnaire performance among obese participants.

Original languageEnglish (US)
Pages (from-to)168-178
Number of pages11
JournalAmerican Journal of Health Behavior
Issue number2
StatePublished - 2012


  • Accelerometer
  • IPAQ-S
  • Obesity
  • Physical activity
  • Self-report

ASJC Scopus subject areas

  • Health(social science)
  • Social Psychology
  • Public Health, Environmental and Occupational Health


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