The association of irregular sleep habits with the risk of being overweight/obese in a sample of Portuguese children aged 6-9 years.

Findings revealed that shorter and longer than recommended sleep duration was positively associated with risk of obesity in boys on weekdays. Furthermore, pediatric obesity risk could be highly influenced by the education level of fathers of both males and females. Future research should extend a similar design, using objective measures of sleep duration to confirm some of the afore-mentioned results.