Dados do Trabalho

Título

JOINT ASSOCIATIONS OF EXCESSIVE DAYTIME SLEEPINESS AND SMARTPHONE SCREEN TIME WITH CELLULAR HEALTH IN ADOLESCENTS

Introdução

The use of smartphones has dramatically increased among adolescents, leading to significantly longer screen time, particularly at night. Previous studies suggest that excessive use of electronic devices is associated with sleep disturbances, such as daytime sleepiness, which can adversely affect various aspects of health, including immune function, hormonal balance, and cognitive capacity. However, the combined interaction between smartphone screen time and daytime sleepiness, and its potential impact on cellular health, remains underexplored.

Objetivo

To analyze the joint associations of excessive daytime sleepiness and smartphone screen time (ST) with cellular health in adolescents.

Métodos

This cross-sectional study included 178 school adolescents (aged 16.5 ± 1.2 years; 72.5% girls) from a federal public school in Paraíba, Brazil. Daytime sleepiness was assessed using the Pediatric Daytime Sleepiness Scale and categorized as “low risk for daytime sleepiness” (<15 points) or “excessive daytime sleepiness” (≥ 15 points). Weekly ST was measured using the “digital well-being” function of smartphones and categorized by the median as low (<7 h/day) or high (≥7 h/day). Participants were divided into four groups: “low risk for daytime sleepiness + low ST”, “low risk for daytime sleepiness + high ST”, “excessive daytime sleepiness + low ST”, and “excessive daytime sleepiness + high ST”. Cellular health was assessed by phase angle (PhA) using electrical bioimpedance (IPGDx brand, Analyzer model). A generalized multiple gamma model was used to estimate the coefficients (β) and 95% confidence intervals (CI) of PhA between groups, using the “excessive daytime sleepiness + high ST” group as a reference, with adjustments for age, sex, economic classification, body mass index, pubertal stage, and moderate to vigorous physical activity.

Resultados

The “low risk for daytime sleepiness + low ST” group showed higher PhA values compared to the reference group (β = 0.324 degrees; 95% CI 0.617, 4.733; p = 0.030). No significant differences were observed in the other groups compared to the reference group (p > 0.05).

Conclusões

The results suggest that the combination of low risk for daytime sleepiness with low smartphone screen time is associated with better cellular health in adolescents.

Palavras -chave

Sleepiness, Sedentary Behavior, Body Composition, Phase Angle, Adolescence.