Nocturnal sleep duration trajectories in early childhood and school performance at age 10 years

Area of Science:

• Developmental Psychology
• Pediatric Sleep Medicine
• Educational Neuroscience

Background:

• Sleep is crucial for cognitive development and brain maturation.
• Early childhood sleep patterns may have lasting effects on later functioning.
• Understanding the long-term impact of sleep duration on academic success is important.

Purpose of the Study:

• To investigate the association between nocturnal sleep duration trajectories in early childhood and academic achievement at age 10.
• To identify specific sleep patterns linked to academic performance in later childhood.

Main Methods:

• Utilized data from the Quebec Longitudinal Study of Child Development, a cohort of 910 children.
• Identified four sleep duration trajectories from ages 2.5 to 6 years using latent class analysis.
• Analyzed parent-reported sleep data and teacher-reported academic performance at age 10 using logistic regression.

Main Results:

• Children with less than 8 hours of sleep at age 2.5 (Traj1) had 3-5 times higher odds of below-average grades in reading, writing, math, and science.
• Consistent sleep of approximately 9 hours (Traj2) was associated with 2-3 times higher odds of below-average performance in math and science.
• Sleep duration at age 10 showed no correlation with academic performance.

Conclusions:

• Early childhood sleep duration, particularly insufficient sleep before age 2.5, is significantly associated with long-term academic achievement.
• Adequate sleep during early development is critical for establishing foundational skills necessary for academic success.
• Sleep duration at age 10 does not appear to influence academic performance, highlighting the critical window of early childhood.