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Influence of sleep-onset time on the development of 18-month-old infants: Japan Children's cohort study

Akiko Iemura1, Mizue Iwasaki1, Noriko Yamakawa2

  • 1Japan Children's Study Group (JCS), Research Institute of Science and Technology for Society, Japan Science and Technology Agency, Tokyo, Japan; Department of Pediatrics and Child Health, Kurume University School of Medicine, Fukuoka, Japan.

Brain & Development
|November 26, 2015
PubMed

Insights

Later sleep onset and longer daytime naps in infants are linked to atypical development. Establishing appropriate infant sleep habits is crucial for healthy neurodevelopmental outcomes.

Area of Science:

  • Pediatric Neurology
  • Developmental Psychology
  • Sleep Science

Background:

  • Infant sleep patterns are critical for healthy development.
  • Understanding the impact of sleep on infant neurodevelopment is essential.
  • Previous research has not fully elucidated the specific sleep factors influencing infant development in Japan.

Purpose of the Study:

  • To investigate the influence of infant sleep patterns on neurodevelopmental outcomes in Japan.
  • To identify specific sleep factors associated with atypical development in 18-month-old infants.
  • To provide evidence-based recommendations for promoting healthy infant sleep habits.

Main Methods:

  • Prospective cohort study involving 479 infants in two Japanese cities.
  • Neurological observations and neurobehavioral screening using the Kinder Infant Developmental Scale (KIDS).
  • Assessment of motor function, language, and social function at 18 months.

Main Results:

  • Later sleep onset time (after 22:00 h) was significantly correlated with atypical development.
  • Longer daytime naps were also positively correlated with atypical development patterns.
  • Each hour of delayed sleep onset past 22:00 h increased the odds of atypical development by 2.944.

Conclusions:

  • Appropriate infant sleeping habits are important for healthy 18-month-old development.
  • While potential confounding factors exist, the findings highlight the significance of sleep.
  • This study underscores the need for early intervention and guidance on infant sleep practices.
Abstract

Keywords:
Cohort studySleeping habitsSocial development

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