Role of Sleep Duration and Timing on Paediatric BMI Across Childhood and Adolescence: Do Both Matter?
Authors' conclusion
Shorter sleep duration at younger ages and later sleep timing in adolescence were associated with higher BMI.
Study context
- Population
- Children aged 2–18 years attending well-child visits, Jan 2019–Dec 2023
- Participants
- 29,409 children
- Exposure
- Each additional/later hour of sleep duration, midpoint and bedtime
- Outcome
- Odds of overweight/obesity and continuous BMI-for-age CDC-based percentiles
Methodological detailsrepeated-measures, mixed effects regression, stratified by age groups
- Repeated-measures
- Mixed effects regression
- Stratified by age groups
Main finding
As reported in the abstract
Odds of overweight/obesity by age group
2-5 years: shorter sleep duration, higher odds (95% CI: 3% to 36%); sleep timing not related
21%
6-12 years: shorter sleep duration, higher odds
18%
95% CI = 9%, 26%
6-12 years: later midpoint, higher odds
32%
95% CI = 17%, 49%
13-18 years: each hour later sleep midpoint, higher odds
12%
95% CI 1% to 23%
Observational data: associations, not effects.
Further findings
Continuous BMI percentiles (linear models)
- Linear models were similar
Original publication
Role of Sleep Duration and Timing on Paediatric BMI Across Childhood and Adolescence: Do Both Matter? Pediatr Obes. Published 21 October 2025. doi:10.
Composed by AI from the published abstract and checked against it. How Briefs are made →