American Journal of Epidemiology, Vol 152, Issue 8 739-746, Copyright © 2000 by Oxford University Press
J O'Loughlin, K Gray-Donald, G Paradis and G Meshefedjian
Longitudinal studies are needed to increase understanding of the causes of
childhood obesity. To identify 1- and 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. Results suggest the need
for interventions to promote increased physical activity in children.
One- and two-year predictors of excess weight gain among elementary schoolchildren in multiethnic, low-income, inner-city neighborhoods [In Process Citation]
Department of Public Health, Regie regionale de la sante et des services sociaux de Montreal-Centre, Quebec, Canada. joloug@po- box.mcgill.ca
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