Childhood predictors of self-harm, externalised violence and transitioning to dual harm in a cohort of adolescents and young adults.

Prevalence of dual harm doubled from age 16 to 22 years, highlighting the importance of early identification and intervention during this high-risk period. Several childhood psychosocial risk factors associated specifically with dual harm at age 16 and with the transition to dual harm by age 22 have been identified.