Résumé :
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[BDSP. Notice produite par INIST qrR0xO9H. Diffusion soumise à autorisation]. Longitudinal studies are needed to increase understanding of the causes of childhood obesity. To identify 1and 2-year predictors of excess weight gain among preadolescents, the authors conducted a prospective cohort study of fourth-and fifth-grade students in 16 elementary schools located in multiethnic, low-income neighborhoods in Montreal, Quebec, Canada, that were participating in the evaluation of a school-based heart health promotion program. Subjects included 2,318 children aged 9-12 years with baseline and 1-year follow-up data and 633 children aged 9-11 years with baseline and 2-year follow-up data. One-year predictors of highest decile of change in body mass index (BMI) identified in logistic regression analyses included baseline BMI of 90th percentile or more (odds ratio (OR)=2.66,95% confidence interval : 1.80,3.94) in boys and baseline BMI of 90th percentile or more (OR=2.34,95% confidence interval : 1.46,3.76), no sports outside school (OR=1.90,95% confidence interval : 1.18,3.06), and playing video games everyday (OR=2.48,95% confidence interval : 1.04,5.92) in girls. Two-year predictors included baseline BMI of 90th percentile or more (OR=3.26,95% confidence interval : 1.52,7.01), no sports outside school (OR=2.14,95% confidence interval : 0.96,4.77), and least active (OR=2.18,95% confidence interval : 1.01,4.71) in boys ; only baseline BMI of 90th percentile or more (OR=2.22,95% confidence interval : 1.02,4.81) was significant in girls. (...)
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