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Home / American Journal of Health Behavior, Volume 36, Number 2

Differential Accuracy of Physical Activity Self-Report by Body Mass Index

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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.

Keywords: ACCELEROMETER; IPAQ-S; OBESITY; PHYSICAL ACTIVITY; SELF-REPORT

Document Type: Research Article

Affiliations: 1: Department of Epidemiology, Human Development and Health, Harvard School of Public Health, Boston, MA, USA 2: Division of Public Health Sciences, Department of Surgery, Washington University School of Medicine, Saint Louis, MO, USA. [email protected] 3: Department of Society, Human Development and Health, Harvard School of Public Health, Boston, MA, USA 4: Health and Human Performance, Montana State University, Bozeman, MT, USA 5: Senior Data Technician, Global Health Institute, Duke University, Department Psychology and Neuroscience, Durham, NC, USA 6: Duke University, Department Psychology and Neuroscience, Durham, NC, USA

Publication date: 01 March 2012

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  • The American Journal of Health Behavior seeks to improve the quality of life through multidisciplinary health efforts in fostering a better understanding of the multidimensional nature of both individuals and social systems as they relate to health behaviors.

    The Journal aims to provide a comprehensive understanding of the impact of personal attributes, personality characteristics, behavior patterns, social structure, and processes on health maintenance, health restoration, and health improvement; to disseminate knowledge of holistic, multidisciplinary approaches to designing and implementing effective health programs; and to showcase health behavior analysis skills that have been proven to affect health improvement and recovery.

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