Journal Article

Reproducibility and Validity of the Shanghai Women’s Health Study Physical Activity Questionnaire

Charles E. Matthews, Xiao-Ou Shu, Gong Yang, Fan Jin, Barbara E. Ainsworth, Dake Liu, Yu-Tang Gao and Wei Zheng

in American Journal of Epidemiology

Published on behalf of Johns Hopkins Bloomberg School of Public Health

Volume 158, issue 11, pages 1114-1122
Published in print December 2003 | ISSN: 0002-9262
Published online December 2003 | e-ISSN: 1476-6256 | DOI: http://dx.doi.org/10.1093/aje/kwg255
Reproducibility and Validity of the Shanghai Women’s Health Study Physical Activity Questionnaire

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In this investigation, the authors evaluated the reproducibility and validity of the Shanghai Women’s Health Study (SWHS) physical activity questionnaire (PAQ), which was administered in a cohort study of approximately 75,000 Chinese women aged 40–70 years. Reproducibility (2-year test-retest) was evaluated using kappa statistics and intraclass correlation coefficients (ICCs). Validity was evaluated by comparing Spearman correlations (r) for the SWHS PAQ with two criterion measures administered over a period of 12 months: four 7-day physical activity logs and up to 28 7-day PAQs. Women were recruited from the SWHS cohort (n = 200). Results indicated that the reproducibility of adolescent and adult exercise participation (κ = 0.85 and κ = 0.64, respectively) and years of adolescent exercise and adult exercise energy expenditure (ICC = 0.83 and ICC = 0.70, respectively) was reasonable. Reproducibility values for adult lifestyle activities were lower (ICC = 0.14–0.54). Significant correlations between the PAQ and criterion measures of adult exercise were observed for the first PAQ administration (physical activity log, r = 0.50; 7-day PAQ, r = 0.62) and the second PAQ administration (physical activity log, r = 0.74; 7-day PAQ, r = 0.80). Significant correlations between PAQ lifestyle activities and the 7-day PAQ were also noted (r = 0.33–0.88). These data indicate that the SWHS PAQ is a reproducible and valid measure of exercise behaviors and that it demonstrates utility in stratifying women by levels of important lifestyle activities (e.g., housework, walking, cycling).

Keywords: data collection; epidemiologic methods; exercise; questionnaires; reproducibility of results; validation studies; Abbreviations: ICC, intraclass correlation coefficient; MET(s), metabolic equivalent(s); PAQ, physical activity questionnaire; SWHS, Shanghai Women’s Health Study.

Journal Article.  5418 words.  Illustrated.

Subjects: Public Health and Epidemiology

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