Cognitive function in preschool children with sleep-disordered breathing.

Area of Science:

• Pediatric Sleep Medicine
• Developmental Psychology
• Neuroscience

Background:

• Sleep-disordered breathing (SDB) is increasingly recognized in children.
• The impact of SDB on cognitive development in preschool-aged children requires further investigation.
• Previous research has yielded mixed results regarding cognitive deficits in children with SDB.

Purpose of the Study:

• To evaluate cognitive functions in preschool children diagnosed with SDB.
• To compare the cognitive performance of SDB children with age-matched healthy controls.
• To determine if SDB severity correlates with cognitive impairment in young children.

Main Methods:

• Recruited a clinical sample of children aged 2.5–6 years with SDB.
• Utilized the sleep clinical record (SCR), a validated questionnaire for SDB diagnosis.
• Conducted polysomnography (PSG) and comprehensive neurocognitive assessments for SDB participants.
• Recruited healthy controls from a kindergarten setting for SCR and cognitive assessments.

Main Results:

• Studied 41 children with mild SDB, 36 with moderate-severe SDB, and 83 controls.
• No significant differences were observed in Verbal IQ, Performance IQ, or Global IQ scores across the three groups.
• Cognitive subtest performance also showed no significant variations between SDB and control groups.
• While SCR scores differed significantly, SDB duration and age of onset were similar between SDB subgroups.

Conclusions:

• Sleep-disordered breathing (SDB) in preschool children, regardless of severity, is not associated with cognitive impairment.
• Cognitive functions, including IQ and specific subtests, appear unaffected by SDB in this age group.
• Findings suggest that early SDB does not pose a risk for cognitive deficits in preschoolers.