Sleep Duration and Risk of Obesity by Sex: Nine-Year Follow-Up of the Young Lives Study in Peru

Childhood Obesity
Sofía I Mercado-GonzalesAntonio Bernabé-Ortiz

Abstract

Background: We aimed to evaluate if there is association between hours of sleep and the risk of obesity among children and whether this association differs by sex. Methods: A secondary data analysis, using information of the Young Lives study, was conducted. The outcome was obesity, based on the BMI for age z-score; the exposure was child's sleep duration (reported by parents) categorized using the National Sleep Foundation guidelines, and as a numerical variable. Baseline and three follow-ups information were used to evaluate association, reporting relative risks (RRs), and 95% confidence intervals (CIs), as well as coefficients and 95% CI. Results: Data from 1949 children, baseline mean age 4.3 (standard deviation: 0.3) and 962 (49.5%) females, were analyzed. Short sleep duration was present in 26.0% (95% CI: 24.0-28.0) at baseline. After 9.6 years of follow-up, the incidence of obesity was 0.83 (95% CI: 0.70-0.98) per 100 person-years at risk. In multivariable model (n = 1579), there was no association between short sleep duration and obesity in the whole sample (p = 0.13); but the risk of obesity was lower among girls (n = 816; RR = 0.45; 95% CI: 0.21-0.96; p = 0.03) compared with boys (n = 763; RR = 1.43; 95% CI: 0.95...Continue Reading

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Citations

Sep 11, 2021·Pediatric Pulmonology·Alexandra D MonzonDorit Koren

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