title: Trajectories of relative weight and waist circumference among children with and without developmental coordination disorder.
abstract: BACKGROUND
  Children with developmental coordination disorder have been found to be less likely to participate in physical activities and therefore may be at increased risk of overweight and obesity. We examined the longitudinal course of relative weight and waist circumference among school-aged children with and without possible developmental coordination disorder.
  
  
  METHODS
  We received permission from 75 (83%) of 92 schools in southwestern Ontario, Canada, to enrol children in the fourth grade (ages 9 and 10 at baseline). Informed consent from the parents of 2278 (95.8%) of 2378 children in these schools was obtained at baseline. The main outcome measures were body mass index (BMI) and waist circumference. Children were followed up over two years, from the spring of 2005 to the spring of 2007.
  
  
  RESULTS
  Over the course of the study, we identified 111 children (46 boys and 65 girls) who had possible developmental coordination disorder. These children had a higher mean BMI and waist circumference at baseline than did those without the disorder; these differences persisted or increased slightly over time. Children with possible developmental coordination disorder were also at persistently greater risk of overweight (odds ratio [OR] 3.44, 95% confidence interval [CI] 2.34-5.07) and obesity (OR 4.00, 95% CI 2.57-6.21) over the course of the study.
  
  
  CONCLUSIONS
  Our findings showed that children with possible developmental coordination disorder were at greater risk of overweight and obesity than children without the disorder. This risk did not diminish over the study period.
authors.affiliation: Department of Psychiatry and Behavioural Neurscience, the School of Rehabilitation Science, CanChild, Centre for Childhood Disability Research, McMaster University, Hamilton, Ontario. cairnej@mcmaster.ca
authors.forename: John
authors.initials: J
authors.lastname: Cairney
authors.forename: John
authors.initials: J
authors.lastname: Hay
authors.forename: Scott
authors.initials: S
authors.lastname: Veldhuizen
authors.forename: Cheryl
authors.initials: C
authors.lastname: Missiuna
authors.forename: Nadilein
authors.initials: N
authors.lastname: Mahlberg
authors.forename: Brent E
authors.initials: BE
authors.lastname: Faught
mesh_terms: D015992:Body Mass Index; D001835:Body Weight; D002648:Child; D005260:Female; D006801:Humans; D008297:Male; D009048:Motor Skills; D019957:Motor Skills Disorders / Q000175:diagnosis / Q000453:epidemiology*; D009765:Obesity / Q000453:epidemiology; D018570:Risk Assessment; D012307:Risk Factors; D055105:Waist Circumference