Sleep and daytime functioning: a short-term longitudinal study of three preschool-age comparison groups

Area of Science:

• Neurodevelopmental disorders
• Pediatric sleep medicine
• Behavioral science

Background:

• Sleep disturbances are common in children with neurodevelopmental conditions.
• Daytime sleepiness and behavioral issues can significantly impact a child's development and daily functioning.
• Understanding the relationship between sleep, sleepiness, and daytime performance is crucial for effective interventions.

Purpose of the Study:

• To investigate sleep patterns, sleepiness, and daytime performance in children with autism and intellectual disability (ID) compared to typically developing peers.
• To determine the persistence of these differences over a six-month period.
• To explore the relationship between objective/subjective sleep measures and daytime outcomes.

Main Methods:

• A comparative study involving 68 children with autism, 57 with ID, and 69 typically developing children.
• Utilized actigraphy for objective sleep assessment and parent reports for subjective sleep problems and daytime behaviors.
• Assessed daytime performance and behaviors through standardized measures.

Main Results:

• Children with autism and ID demonstrated poorer daytime performance and behaviors than typically developing children.
• The ID group exhibited significantly higher levels of daytime sleepiness compared to both autism and typically developing groups.
• These disparities remained consistent over the six-month study duration.
• Actigraphy data did not correlate with daytime sleepiness or performance in autism or typically developing groups.
• In the ID group, prolonged night awakenings and reduced sleep efficiency predicted increased daytime sleepiness.
• Parent-reported sleep problems were linked to greater daytime sleepiness and behavioral issues across all groups.

Conclusions:

• Children with autism and ID face significant challenges in daytime functioning and exhibit increased sleepiness.
• Sleep problems, particularly those reported by parents, are strongly associated with daytime sleepiness and behavioral difficulties in these populations.
• While objective sleep measures showed specific links in the ID group, parent-reported sleep issues appear to be a more universal predictor of daytime impairment.