Patterns of marijuana use and physical health indicators among Canadian youth

Abstract We examine how trajectories of marijuana use in Canadian youth (ages 15 to 28) are related to physical health indicators in adolescence and young adulthood. Youth were initially recruited in 2003 (N = 662; 48% male; ages 12 to 18) and followed for six waves. Five trajectories of marijuana use (Abstainers‐29%, Occasional users‐27%, Decreasers‐14%, Increasers‐20% and Chronic users‐11%) were identified. Chronic users reported more physical symptoms, poorer physical self‐concept, less physical activity, poorer eating practices, less sleep, and higher