title: Reproducibility and validity of the Shanghai Women's Health Study physical activity questionnaire.
abstract: 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 (kappa = 0.85 and kappa = 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).
authors: Department of Medicine, Vanderbilt-Ingram Cancer Center, Center for Health Services Research, Vanderbilt University Medical Center, Nashville, TN 37232-8300, USA. charles.mattews@vanderbilt.edu
authors: Charles E
authors: CE
authors: Matthews
authors: Xiao-Ou
authors: XO
authors: Shu
authors: Gong
authors: G
authors: Yang
authors: Fan
authors: F
authors: Jin
authors: Barbara E
authors: BE
authors: Ainsworth
authors: Dake
authors: D
authors: Liu
authors: Yu-Tang
authors: YT
authors: Gao
authors: Wei
authors: W
authors: Zheng
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D002681:China; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008019:Life Style; D008875:Middle Aged; D009043:Motor Activity; D015203:Reproducibility of Results; D011795:Surveys and Questionnaires