Posted innews Pediatrics Psychiatry Public Health
Peer Self-harm Predicts a Small Increase in Adolescent Risk with a Peak at Age 16: Findings from a Nationwide Finnish Cohort
A Finnish registry cohort (n=913,149) found that exposure to same-grade schoolmates' self-harm modestly increased later self-harm risk (HR 1.05), with the largest effect around age 16 (HR ~1.45), suggesting time-limited social transmission modulated by developmental transitions.