Sleep-disordered breathing and cognitive functioning in preschool children with and without Down syndrome

A Joyce1, D Dimitriou2

  • 1Centre for Research in Psychology, Behaviour and Achievement, Coventry University, Coventry, UK.

Insights

Sleep-disordered breathing (SDB) impacts typically developing children

Area of Science:

  • Developmental Psychology
  • Pediatric Sleep Medicine
  • Genetics and Neurodevelopment

Background:

  • Sleep significantly influences children's cognitive development, school readiness, and academic success.
  • Children with Down syndrome (DS) face a heightened risk for sleep-disordered breathing (SDB).
  • The relationship between SDB and cognitive function in preschoolers with DS remains largely unexplored.

Purpose of the Study:

  • To investigate the association between sleep-disordered breathing (SDB) and cognitive, behavioral, and language outcomes in preschoolers.
  • To compare these associations in typically developing (TD) children and children with Down syndrome (DS).

Main Methods:

  • Cardiorespiratory polygraphy was used to assess sleep in 22 TD preschoolers and 22 with DS.
  • Cognitive abilities were evaluated using the Mullen Scales of Early Learning.
  • Behavioral and language assessments were conducted using the Strengths and Difficulties Questionnaire (SDQ) and MacArthur Communicative Development Inventory (MCDI).

Main Results:

  • In TD children, longer sleep duration correlated with enhanced expressive language and fewer emotional difficulties.
  • SDB in TD children was linked to increased conduct problems and reduced prosocial behavior.
  • Conversely, in children with DS, SDB was associated with improved language understanding and the use of actions and gestures.

Conclusions:

  • Findings in TD children support the hypothesis that sleep problems negatively affect cognition and behavior.
  • For children with DS, complex factors may mediate or mask the sleep-cognition link, necessitating further research.
  • Longitudinal studies are recommended to precisely determine the impact of sleep on cognitive development in DS, considering individual differences.
Abstract

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