Compositional associations of time spent in sleep, screen time, and physical activity with polysubstance use in adolescents

Abstract

This study of grade 6–10 students used compositional analysis to examine the relationship between the movement behavior composition (time in sleep, screen time, and physical activity) and polysubstance use (frequency of using cigarettes, alternative tobacco products, alcohol, cannabis, and illicit drugs). In grades 6–8 students and grades 9–10 girls: 1) sleep was negatively associated with polysubstance use, 2) screen time was positively associated with polysubstance use, and 3) reallocating physical activity or screen time into sleep was associated with lower polysubstance use. In grades 9–10 boys, reallocating 60 min/day from physical activity into screen time or sleep was associated with greater polysubstance use.