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Cohort study
Short sleep duration is associated with increased BMI in adolescents over time
  1. Christopher Magee,
  2. Jeong Kyu Lee
  1. Centre for Health Initiatives, University of Wollongong, Wollongong, New South Wales, Australia
  1. Correspondence to: Dr Christopher Magee, Centre for Health Initiatives, University of Wollongong, Northfields Avenue, Wollongong, New South Wales, 2522, Australia; cmagee{at}uow.edu.au

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Context

There is growing interest surrounding short sleep duration as a potential contributor to obesity.1 Most research has been cross-sectional and hence the nature of the temporal associations between sleep duration and indices of body composition is less clear. This is an issue because the association between sleep duration and obesity could be bidirectional.2 More well-designed longitudinal studies are therefore needed to examine the relationships between sleep duration and obesity, especially in adolescents where data are particularly limited.

Methods

This study investigated whether sleep duration was associated with changes in body mass index (BMI) over time in 1390 adolescents recruited from four schools in the …

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