Abstract:Objective: To examine the relationship between time in bed, sleep sufficiency and emotional and behavioral problems in a general population of children aged 10-12 years (N=5095).
Methods:Emotional and behavioral problems were assessed using The Strength and Difficulties questionnaire, which was completed by children, parents and teachers. Data on time in bed, sleep sufficiency and potential confounders (gender, pubertal development, mother's education and family economy) were parent reported.Results: Controlling for gender, pubertal development and socioeconomic status, childrens emotional and behavioral problems as rated by parents were related to insufficient sleep. Self-reported emotional symptoms and parent-reported conduct problems were associated with both shorter time in bed and insufficient sleep. Teacher-reported hyperactivity was associated with long time in bed.Conclusions: Children with self-reported emotional symptoms or parent-reported conduct problems seem to spend too little time in bed and to obtain insufficient sleep.Keywords: Time in bed, sleep sufficiency, emotional and behavioral problems, school-aged children, Norway.There is accumulating evidence that children and adolescents sleep less than recommended. First, short time in bed is common. In a Norwegian study it was found that about 40% of 16-19 year olds spent less than 7 hours in bed at night on weekdays [1], despite the required sleep duration for this age group being between 8 and 9 hours [2]. Second, time in bed has decreased over the last decades. A comparison of three birth cohorts that were followed from birth to 16 years of age, showed a decreasing trend of sleep duration across cohorts [3].Adequate sleep is increasingly seen as important for physical and mental health in children [4]. Among 12-18 year olds short self-reported sleep duration have been associated with especially self-reported depressive symptoms [5,6] but also aggression [7] and inattention [8]. Moreover, in a longitudinal study of 11 year old children who reported to have obtained less sleep over time, exhibited higher levels of self-reported depression and lower levels of self-esteem three years later [9].Gender, socioeconomic -and puberty status have been found to influence sleep duration in children. Girls have been found to sleep longer in adolescence [10], while there are no *Address correspondence to this author at the Centre for Child and Adolescent Mental Health and Welfare, Uni Health, Uni Research, Norway; Tel: +47 5558 3133; Fax: +47 5558 8379; E-mail:Hedvik.Fosse@uni.no gender difference in sleep patterns in prepubertal children [11]. Also low socioeconomic status has been associated with short sleep duration [12,13]. The onset of puberty involves changes at multiple levels and is one factor thatinfluences both sleep and emotional and behavioral problems, however few studies have controlled for this factor. Sleepwake organization undergoes reorganization during the transition to adolescence and these changes seem to antedate bodily changes. T...