Clustering of screen time behaviours in adolescents and its association with waist circumference and cardiorespiratory fitness

Objectives To identify the association of clusters of screen time (ST) behaviours with waist circumference (WC) and cardiorespiratory fitness (CRF) among adolescents. Design Cross-sectional study of 574 adolescents (53% girls, 13 years), conducted in 2017. Methods Waist circumference was measured, a shuttle run was performed to assess CRF, and a questionnaire was applied. Sex, age, socioeconomic status was reported, and daily duration of ST...