Prospective associations of sleep duration and screen time with transition from overweight/obesity to normal body mass index (BMI) in U.S. adolescents
Main finding · Transition to normal BMI percentile by sleep durationResult — go to the resultHazard ratio 0.60 95% CI 0.44–0.82Authors' conclusion
Short sleep duration was prospectively associated with a lower likelihood of transitioning to a normal BMI among adolescents with overweight/obesity. This association warrants further investigation as a potential intervention target.
Study context
- Population
- US adolescents aged 9–11 years with overweight/obesity (BMI percentile ≥85), 45.1% female, Adolescent Brain Cognitive Development (ABCD) Study
- Participants
- 3,498 adolescents
- Exposure
- Parent-reported sleep duration categories and screen time
- Outcome
- Transition from overweight/obesity (BMI percentile ≥85) to normal BMI (BMI percentile <85)
- Follow-up
- Median 657 days
Methodological detailsCox proportional hazards models, adjusted for key covariates including pubertal status
- Cox proportional hazards models
- Adjusted for key covariates including pubertal status
Main finding
As reported in the abstract
Transition to normal BMI percentile by sleep duration · median 657 days
Hazard ratio
0.60
95% CI 0.44–0.82
P = 0.003 for trend
7-8 hvs 9-11 h
HR 0.60 (95% CI 0.44–0.82); P for trend = 0.003
- Transitioned to normal BMI percentile (overall)
- 643 (18.4%)
Observational data: associations, not effects.
Further findings
| Outcome | HR (95% CI) | P value | |
|---|---|---|---|
| Transition to normal BMI by sleep duration, sex-stratified7-8 hvs 9-11 hFemales | 0.55 (0.30–0.98) | P for trend < 0.05 | |
| Transition to normal BMI by sleep duration, sex-stratified7-8 hvs 9-11 hMales | 0.59 (0.41–0.86) | P for trend < 0.05 | |
| 0.20.5125Hazard ratio (log scale) |
Transition to normal BMI by higher screen time (per hour/day)
- HR overall
- 0.99 (95% CI 0.96, 1.02)
- HR females
- 1.00 (95% CI 0.95, 1.05)
- HR males
- 0.99 (95% CI 0.95, 1.02)
- Not associated
Original publication
Prospective associations of sleep duration and screen time with transition from overweight/obesity to normal BMI in U.S. adolescents. Int J Obes (Lond). Published 23 December 2025. doi:10.
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