Correlates of Sleep and Pediatric Bipolar Disorder

Abstract

STUDY OBJECTIVE: To determine, based on a large community sample, the prevalence and associated sleep characteristics of children with a bipolar mood disturbance behavioral profile. METHODS: Participants who fit the pediatric bipolar disorder profile as derived from the Child Behavior Checklist were matched to control participants for age, sex, ethnicity, parentally reported attention-deficit/hyperactivity disorder, psychotropic medication usage, and apnea-hypopnea indexes. Paired comparisons were made between the groups to examine differences on polysomnographic data and parentally reported sleep characteristics. RESULTS: Thirteen (approximately 3%) of 438 participants fit the pediatric bipolar disorder profile. These children demonstrated significant sleep-continuity disturbances with poorer sleep efficiency and more awakenings after sleep onset, less rapid eye movement sleep, and longer periods of slow-wave sleep than their matched counterparts during overnight polysomnography. In addition, responses to a parental-report questionnaire about child sleep behavior suggest these children have significant sleep problems, including more difficulty initiating sleep, restless sleep, nightmares, and morning headaches relative to the control group. CONCLUSIONS: Children with a pediatric bipolar disorder profile display consistent quantitative differences in sleep relative to matched controls. Prevalence rates of pediatric bipolar disorder, as assessed by the Child Behavior Checklist, are consistent with those found in the adult bipolar population.

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