Sleep variability and learning outcomes in preterm and full-term children: An observational study

Area of Science:

• Neuroscience
• Developmental Psychology
• Pediatrics

Background:

• Perinatal care advancements have improved preterm infant survival.
• Neurodevelopmental outcomes in preterm infants remain a concern.
• Intraindividual variability (IIV) in sleep duration's impact on cognition is under-explored.

Purpose of the Study:

• To investigate the relationship between sleep duration IIV and crystallized intelligence in very low birth weight (VLBW) children.
• To examine if preterm birth modifies the association between sleep variability and learning outcomes.

Main Methods:

• 38 children (18 VLBW, 20 full-term) aged 5-6 years participated.
• Sleep duration assessed via actigraphy and sleep diaries.
• Crystallized intelligence measured using the Kaufman Assessment Battery for Children (K-ABC) Achievement Scale (ACH).

Main Results:

• Sleep duration IIV adversely affected ACH scores in preterm children, but not in full-term children.
• A significant interaction between sleep variability and preterm birth predicted ACH scores (p=0.032).
• Among VLBW children, older age correlated with lower ACH scores.

Conclusions:

• Early childhood learning in preterm children is vulnerable to sleep instability.
• Sleep regulatory mechanisms play a crucial role in cognitive development.
• Monitoring and supporting healthy sleep habits in preterm children is vital for mitigating learning difficulties and improving academic performance.