Relationship between short sleeping hours and childhood overweight/ XXXX : results from the 'Qu  bec en Forme' Project.

@entity1 @entity28
OBJECTIVE: To assess the relationship between short sleep duration and @entity28 -related variables in @entity1 involved in the 'Qu  bec en Forme' Project. DESIGN: Cross-sectional study. SUBJECTS: A total of 422 @entity1 (211 @entity1 and 211 @entity1 ) aged between 5 and 10 years from primary schools in the City of Trois-Rivi  res (Qu  bec) were selected to participate in this study. MEASUREMENTS: Body weight, height and waist circumference were measured. The @entity1 were classified as normal, underweight, overweight or @entity28 , according to body mass index (BMI) per age. An exhaustive questionnaire was administered by telephone to the parents of @entity1 . RESULTS: The percentage of overweight/ @entity28 was 20.0% in @entity1 and 24.0% in @entity1 . When compared to @entity1 reporting 12-13 h of sleep per day, the adjusted odds ratio for childhood overweight/ @entity28 was 1.42 (95% confidence interval 1.09-1.98) for those with 10.5-11.5 h of sleep and 3.45 (2.61-4.67) for those with 8-10 h of sleep after adjustment for age, sex, and other risk factors. Parental @entity28 , low parental educational level, low total family income, long hours of TV watching, playing videogames or computer utilization, absence of breastfeeding and physical inactivity were also significantly associated with childhood overweight/ @entity28 . In addition, we observed a significant negative association adjusted for age between sleep duration and body weight (-0.33, P<0.01), BMI (-0.12, P<0.01) and waist circumference (-0.24, P<0.01) in @entity1 . CONCLUSION: An inverse association was observed between sleep duration and the risk to develop childhood overweight/ @entity28 . Longitudinal research will be required to confirm a potential link of causality between these variables.
