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Sleep disorders in preschoolers: prevalence and comorbidity with psychiatric symptoms
Silje Steinsbekk1, Turid S Berg-Nielsen, Lars Wichstrøm
1*Department of Psychology, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; †Department of Child and Adolescent Psychiatry, St. Olav's University Hospital, Trondheim, Norway; ‡Faculty of Medicine, Norwegian University of Science and Technology (NTNU), Trondheim, Norway; §NTNU Samfunnsforskning AS, Trondheim, Norway.
Insights
Primary insomnia is common in preschoolers, affecting 16.6% of children. Sleep disorders in young children are linked to anxiety and depression symptoms, highlighting the need for early intervention.
Area of Science:
- Child Psychology
- Pediatric Sleep Medicine
- Psychiatric Epidemiology
Background:
- Sleep disorders are prevalent in preschool-aged children.
- The relationship between sleep disorders and psychiatric symptoms in this age group requires further investigation.
Purpose of the Study:
- To determine the prevalence of diagnosable sleep disorders in preschoolers.
- To examine the association between specific sleep disorders and psychiatric symptoms in young children.
Main Methods:
- A large cohort of 4-year-old children in Norway was recruited.
- A structured diagnostic interview (Preschool-Age Psychiatric Assessment) was administered to parents of a subsample.
- Data from 995 parents were analyzed.
Main Results:
- The overall prevalence of diagnosable sleep disorders was 19.2%.
- Primary insomnia was the most common disorder (16.6%), followed by nightmare disorder (2.2%).
- Primary insomnia was associated with depression and anxiety symptoms, while nightmare disorder was linked to generalized anxiety disorder.
Conclusions:
- Primary insomnia is a common sleep disorder in preschoolers.
- Sleep disorders in young children are frequently comorbid with psychiatric conditions, particularly anxiety disorders.
- Findings underscore the importance of addressing sleep problems in early childhood to mitigate psychiatric comorbidities.
Objectives:
This study provides data on the prevalence of diagnosable sleep disorders in preschoolers and examined the relationship between specific sleep disorders and a range of DSM-4-defined psychiatric symptoms.
Methods:
All children born in 2003 or 2004 in Trondheim, Norway, who attended regular community health checkups for 4 year olds were asked to participate (97.2% attendance; 82.0% consent rate, N = 2475). A screen-stratified subsample of 1250 children was recruited to participate in an additional comprehensive study that included a structured diagnostic interview (the Preschool-Age Psychiatric Assessment). Nine hundred ninety-five parents (79.6%) completed the interview.
Results:
The estimated sleep disorder rate was 19.2%. Rates of specific disorders were as follows: primary insomnia (16.6%), primary hypersomnia (0.8%), nightmare disorder (2.2%), and sleepwalking disorder (0.7%). When adjusted for a range of common psychiatric symptoms, primary insomnia was specifically related to symptoms of depression, generalized anxiety disorder, separation anxiety, and specific phobia. When sleep problems were excluded as a symptom of depression, the association between depression and primary insomnia was no longer significant. Nightmare disorder was significantly related to generalized anxiety disorder.
Conclusions:
This first study of the prevalence and comorbidity of diagnosable sleep disorders in preschoolers indicates that primary insomnia is common in young children, whereas other sleep disorders are rare. Sleep disorders are related to psychiatric symptoms, particularly symptoms of anxiety disorders.
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