Associação entre duração do sono e comportamento alimentar em escolares de 7 a 14 anos do município de Florianópolis-SC

Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Programa de Pós-Graduação em Nutrição, Florianópolis, 2014Introdução: Períodos mais curtos de sono estão associados a hábitos alimentares menos saudáveis, incluindo uma preferência por alimentos gordurosos, pular o almoço, fazer lanches e comer fora de casa. Objetivo: Verificar a associação entre duração do sono e comportamento alimentar em escolares de 7 a 14 anos de Florianópolis, Santa Catarina, Brasil. Método: Trata-se de um estudo transversal, realizado com amostra probabilística de 2506 escolares matriculados em escolas públicas e privadas. Os dados de sono foram obtidos com base em questionário estruturado enviado aos pais, juntamente com o Termo de Consentimento Livre e Esclarecido. A variável independente do estudo foi a duração do sono dicotomizada em ?sono insuficiente? (Abstract : Introduction: Shorter sleep durations are associated with less healthy dietary habits, including a preference for fatty foods, skipping breakfast, snacking and eating outside the home. Objective: To assess the association between sleep duration and eating behavior inschool children from Florianópolis, Santa Catarina, Brazil. Method: This is a cross-sectional study with 2506 schoolchildren enrolled in public and private schools. Sleep data were collected through a questionnaire sent to the parents along with the Informed Consent Statement. The independent variable was sleep, categorized into three groups, insufficient sleep "(<9 hours) and "sufficient sleep? ? (=9h). Dietary intake of schoolchildren was assessed by a Food Questionnaire of the Previous Day (PDFQ-3). The dependent variables were: daily number of meals, food healthy consumption and food unhealthy consumption, breakfast omission and replacement of lunch and dinner with snacks. Bivariate and multivariate analyzes were performed using Stepwise Multiple Linear Regression, using the STATA 11.0, according to the analysis model. The results were presented by prevalence ratios and their intervalor of 95%. The level of statistical significance for association was 5%. Results: Most schoolchildren showed prevalence of sufficient sleep 57.2% (95% CI 38.9 to 46.8). Regarding food consumption, 13.2% (95% CI 10.9 to 16.0) of the students consumed inadequate daily numbers of meals and 88.8% (95% CI 86.0 to 91.7) consumed inappropriate consumption both of healthy foods (88.8%, 95% CI 86.0 to 91.7) and unhealthy foods (61.1% 95 55.5% -. 66.4). However, there was a low frequency of breakfast omission (11.6%, 95% CI 9.6 to 13.9) and replacement of lunch with snacks (4.8% , 95% CI 3.1 to 6.4) or replacement of dinner with snacks (5.8%, 95% CI 4.2 to 7.3). The schoolchildren who sleep less have 1.33 (95% CI 1.00 to 1.76) or 33% more likely to consume an inadequate number of meals (= 3 times / day) than those with sufficient sleep duration and 1.56 (95% CI 1.10 to 2.22) or 56% more likely to make an inadequate intake of healthy foods (