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Open Access Research article

Reproducibility of physical activity recall over fifteen years: longitudinal evidence from the CARDIA study

Ashley Wilder Smith15*, Kathleen A Cronin2, Heather Bowles1, Gordon Willis1, David R Jacobs34, Rachel Ballard-Barbash1 and Richard P Troiano1

Author Affiliations

1 Applied Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD, USA

2 Surveillance Research Program, Division of Cancer Control and Population Sciences, National Cancer Institute, Bethesda, MD, USA

3 Division of Epidemiology and Community Health, School of Public Health, University of Minnesota, Minneapolis, MN, USA

4 Department of Nutrition, School of Medicine, University of Oslo, Oslo, Norway

5 Outcomes Research Branch, Applied Research Program, National Cancer Institute, Executive Plaza North, Room 4005, 6130 Executive Boulevard, MSC 7344, Bethesda, MD 20892-7344, USA

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BMC Public Health 2013, 13:180  doi:10.1186/1471-2458-13-180

Published: 28 February 2013

Abstract

Background

To examine the benefits of physical activity (PA) on diseases with a long developmental period, it is important to determine reliability of long-term PA recall.

Methods

We investigated 15-year reproducibility of PA recall. Participants were 3605 White and African-American adults in the Coronary Artery Risk Development in Young Adults study, aged 33–45 at the time of recall assessment. Categorical questions assessed PA before and during high school (HS) and overall PA level at Baseline, with the same timeframes recalled 15 years later. Moderate- and vigorous-intensity scores were calculated from reported months of participation in specific activities.

Results

HS PA recall had higher reproducibility than overall PA recall (weighted kappa = 0.43 vs. 0.21). Correlations between 15-year recall and Baseline reports of PA were r = 0.29 for moderate-intensity scores, and r = 0.50 for vigorous-intensity. Recall of vigorous activities had higher reproducibility than moderate-intensity activities. Regardless of number of months originally reported for specific activities, most participants recalled either no activity or activity during all 12 months.

Conclusion

PA recall from the distant past is moderately reproducible, but poor at the individual level, among young and middle aged adults.