Résumé :
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[BDSP. Notice produite par INIST-CNRS 28t9R0xJ. Diffusion soumise à autorisation]. 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 (K=0.85 and K=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).
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