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Short sleep duration in middle childhood: risk factors and consequences

Gillian M Nixon1, John M D Thompson, Dug Yeo Han

  • 1Ritchie Centre obr Baby Health Research, Monash Institute of Medical Research, Monash University, Melbourne, Australia.

Sleep
|January 29, 2008
PubMed

Insights

Short sleep duration in 7-year-old children is linked to increased risk of obesity and overweight. Factors like weekdays, seasons, and younger siblings influence sleep duration in this age group.

Area of Science:

  • Pediatric Sleep Medicine
  • Childhood Obesity Research
  • Developmental Psychology

Background:

  • Sleep duration is crucial for children's health and development.
  • Understanding determinants of sleep is key to addressing sleep deficits.
  • Short sleep duration is a potential risk factor for adverse health outcomes in children.

Purpose of the Study:

  • To measure sleep duration in 7-year-old children.
  • To identify factors influencing sleep duration.
  • To assess the association between short sleep and obesity, cognitive function, and behavior.

Main Methods:

  • Longitudinal community-based study involving 519 seven-year-old children with complete sleep data.
  • Sleep duration measured via actigraphy; other assessments included BMI, body fat percentage, intelligence (WISC-III), and behavior (Strengths & Difficulties, Conners Rating Scales).

Main Results:

  • Mean sleep duration was 10.1 hours; shorter sleep was associated with weekdays, summer, and absence of younger siblings.
  • Sleep duration less than 9 hours was independently associated with being overweight/obese (OR=3.32) and increased body fat.
  • Short sleep duration correlated with higher emotional lability but not with IQ or ADHD scores.

Conclusions:

  • Sleep duration in 7-year-olds varies significantly and is influenced by weekday, season, and sibling status.
  • Short sleep duration (<9 hours) is an independent risk factor for overweight and obesity in children.
  • Findings highlight the importance of adequate sleep for maintaining healthy weight in childhood.
Abstract

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