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Related Experiment Video

Updated: May 18, 2026

Assessment of Child Anthropometry in a Large Epidemiologic Study

Assessment of Child Anthropometry in a Large Epidemiologic Study

Published on: February 2, 2017

Sleep duration and adiposity during adolescence.

Joana Araújo¹, Milton Severo, Elisabete Ramos

¹Department of Clinical Epidemiology, Predictive Medicine and Public Health, and Cardiovascular Research & Development Unity, University of Porto Medical School, Porto, Portugal. jfaraujo@med.up.pt

|October 3, 2012

Summary

This summary is machine-generated.

Adolescent sleep duration impacts obesity, with gender differences observed. Shorter sleep in younger boys was linked to higher adiposity later, but this effect diminished with age.

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Area of Science:

Adolescent health
Obesity research
Sleep science

Background:

The relationship between sleep and obesity is complex and inconsistent in adolescents.
Limited data exists to clarify these associations in this demographic.

Purpose of the Study:

To investigate the association between sleep duration and adiposity in adolescents at ages 13 and 17.
To employ both cross-sectional and longitudinal analyses to understand these relationships.

Main Methods:

Evaluated 1171 adolescents from the EPITeen cohort at ages 13 and 17.
Assessed sleep duration via self-report and measured adiposity using BMI z scores and body fat percentage (BF%).
Utilized regression coefficients and cross-lagged analysis to determine associations and causal relations.

Main Results:

Cross-sectionally, shorter sleep was linked to higher BMI z scores in 13-year-old boys.
At 17 years, longer sleep correlated with higher BF% in girls.
Longitudinally, shorter sleep at 13 predicted lower BMI z scores and BF% at 17 in boys, but this effect was mediated by baseline adiposity.

Conclusions:

Sleep duration influences adiposity during early adolescence.
Significant gender differences exist in the association between sleep duration and adolescent adiposity.