cigarette smoking, physical activity, and recreational screen time (ST) in a cohort of
Canadian adolescents (ages 14–17 years; grades 9–12). Aims and Methods Data from
5951 adolescents who participated in COMPASS Year 4 (2015–2016; baseline) and Year 6
(2017–2018; follow-up) were used. Exposures included e-cigarette use and cigarette
smoking. Outcomes included cutpoints for moderate-to vigorous-physical activity (MVPA;≥ …