title: Sleep duration and body mass index among southern Brazilian preschoolers.
abstract: Prevention and treatment of overweight are particularly complex, reinforcing the importance of studies aimed at clarifying their range of causes and effects. Thus, the objective of this study was to evaluate the relationship between night sleep duration and anthropometric measurements. A cross-sectional analysis was performed from data from 348 children aged 3 and 4 years in São Leopoldo/RS. Night sleep duration was reported by their mothers and body mass index, waist circumference and skinfold thickness were measured according to standard protocol. The analyses were adjusted for energy intake and hours of television watching. Overweight children had, on average, 0.39 hours less sleep than those with normal weight (9.77 ± 1.44 versus 10.17 ± 1.34; 95% CI 0.03 to 0, 76). We observed an inverse association between night sleep duration and z score values of body mass index for age (B = -0.12 95% CI -0.22 - -0.02). Waist circumference and skinfold thickness showed an inverse relationship with sleep duration, but without any statistic differences. Among preschool children in southern Brazil, smaller night sleep duration was associated with higher body mass index.
authors: Universidade Federal de Ciências da Saúde de Porto Alegre, RS, Brasil. maria.laura.louzada@gmail.com
authors: Maria Laura da Costa
authors: ML
authors: Louzada
authors: Fernanda
authors: F
authors: Rauber
authors: Paula Dal Bó
authors: PD
authors: Campagnolo
authors: Márcia Regina
authors: MR
authors: Vitolo
mesh_terms: D000367:Age Factors; D015992:Body Mass Index; D001938:Brazil; D002675:Child, Preschool; D005260:Female; D006801:Humans; D008297:Male; D012885:Skinfold Thickness; D012890:Sleep / Q000502:physiology*; D012959:Socioeconomic Factors; D013997:Time Factors; D055105:Waist Circumference / Q000502:physiology