engleski

Stability of sedentary behaviours in adolescents: a 4-year follow-up study

INTRODUCTION: Recent studies have shown association of sedentary behavior, primarily screen time with increased risk for obesity and cardio-metabolic risks in adolescents. Moderate stability of this trait has been reported in previous studies. However, little is known about stability of other domain of sedentary behavior during late adolescence. METHODS: In this longitudinal study, participants were 844 high- school students (mean age at the baseline 15.6 years, 49% of th e girls). To assess different sedentary behaviours, School Health Action, Planning and Evaluation System (SHAPES) questionnaire was used. Four types of sedentary behaviours were: (1) total sedentary behaviour, (2) screen-time, (3) studying and (4) other sedentary behavi our activities. General estimating equations (GEE) were used to calculate stability coefficient, stratified by gender. RESULTS: Over a 4-year of follow-up, stability coefficients for total sedentary behaviour, screen-time, studying and other sede ntary behav- iour were similar in both boys (0.63, 0.60, 0.66 and 0.72) and girls (0.60, 0.64, 0.70 and 0.63). CONCLUSION: Our results show moderate tracking of sedentary behaviours over a 4-year of follow-up in high-school students. Thus, policies and strategies that promote higher levels of physical activity and decline the time spending in sedentary behaviours a re warranted.

adolescents ; sedentary behaviours

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