Sleep problems and mental health among young Norwegian adolescents.

PURPOSE: The present study investigated the associations between the aspects of sleep problems and mental health in Norwegian young adolescents. MATERIALS AND METHODS: Adolescents (12-13 years) were recruited from the primary schools in Telemark County, Norway. Sleep related problems were assessed by asking parents three questions related to their childrens' sleep quality, sleep sufficiency, and daytime sleepiness. Parents reported data on mental health by the extended version of the Strengths and Difficulties Questionnaire (SDQ), and information on the child's physical activity, screen time, eating pattern, gender, and background variables. Height and weight were objectively measured. Complete data were obtained for 690 adolescents. RESULTS: Multiple logistic regressions were used. Bivariate analyses indicated important associations between the sleep aspects and mental health. When adjusting the sleep variables for each other, lifestyle factors and background variables, sleep quality problems were associated with any psychiatric problem (ORadj: 4.0, CI: 2.0-8.2), emotional problems (ORadj: 15.1, CI: 3.4-66.8), and hyperactivity-inattention problems (ORadj: 5.1, CI: 2.2-12.1). Daytime sleepiness problems were associated with any psychiatric problem (ORadj: 2.3, CI: 1.2-4.4), and hyperactivity-inattention problems (ORadj: 2.5, CI: 1.1-5.5). Bivariate associations between problems with sufficient sleep and mental health problems lost the significance when adjusted for other sleep variables. CONCLUSIONS: The results indicate that different aspects of sleep problems may be important underlying factors for mental health problems in adolescents, independently of lifestyle factors, BMI-category, gender, and background variables. This highlights the importance of examining specific sleep problems when investigating associations between sleep and mental health.

Associations between overweight, peer problems, and mental health in 12-13-year-old Norwegian children.

Overweight and mental health problems represent two major challenges related to child and adolescent health. More knowledge of a possible relationship between the two problems and the influence of peer problems on the mental health of overweight children is needed. It has previously been hypothesized that peer problems may be an underlying factor in the association between overweight and mental health problems. The purpose of the present study was to investigate the associations between overweight, peer problems, and indications of mental health problems in a sample of 12-13-year-old Norwegian schoolchildren. Children aged 12-13 years were recruited from the seventh grade of primary schools in Telemark County, Norway. Parents gave information about mental health and peer problems by completing the extended version of the Strength and Difficulties Questionnaire (SDQ). Height and weight were objectively measured. Complete data were obtained for 744 children. Fisher's exact probability test and multiple logistic regressions were used. Most children had normal good mental health. Multiple logistic regression analysis showed that overweight children were more likely to have indications of psychiatric disorders (adjusted OR: 1.8, CI: 1.0-3.2) and peer problems (adjusted OR: 2.6, CI: 1.6-4.2) than normal-weight children, when adjusted for relevant background variables. When adjusted for peer problems, the association between overweight and indications of any psychiatric disorder was no longer significant. The results support the hypothesis that peer problems may be an important underlying factor for mental health problems in overweight children.