Background/objectives: The study prospectively assessed the association between sleep duration and the consumption of ultra-processed foods in adolescent students from a Brazilian capital.
Methods: We observed 1431 adolescents participating in the Longitudinal Study on sedentary behavior, physical activity, dietary habits, and adolescent health, aged 10 to 14 years, in the years 2014 to 2017. The percentage of consumption of ultra-processed foods was evaluated by the Friedman test. Generalized Estimation Equation (GEE) models with parameters for robust analysis were used to verify the prospective association between sleep and the consumption of ultra-processed foods.
Results: The percentage consumption of ultra-processed foods in relation to total daily calories increased in boys between 15 and 17 years old (31.8% in 2015 to 35.8% in 2017), being more stable among older girls (36.7% in 2015 to 37.7% in 2017), which may have occurred due to the influence of the social environment, reduced critical capacity, and lower concern for nutrition. This excessive consumption can lead to health and body composition impairments. Over time, adolescents who were in the fourth quartile of sleep had a 1.4% reduction (95% CI -2.49; -0.28) in the energy percentage from ultra-processed foods. When adjusting the initially used model in the GEE (Generalized Estimation Equation) with sociodemographic variables (income, maternal education, age) and lifestyle factors, sleep duration decreased by 2.1% (95% CI -4.09; -0.22) only in boys. The shorter duration of sleep in adolescents has been shown to be associated with unhealthy behavioral factors, such as a preference for fatty and sugary foods. There were no statistically significant associations for girls in this model.
Conclusions: Sleep influences the consumption of ultra-processed foods in adolescents, showing that as sleep time increases, the consumption of foods classified as ultra-processed decreases.
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