In total, 19% of the sample reported a lifetime history of self harm at age 16 years (n=894/4799); these participants account for 24% of those who were not in education, employment, or training (NEET) at age 19 years, 40% of those with depressive and anxiety disorders, and over 35% of those with problem substance use at age 18 years. The prevalence of good outcomes (no mental health or substance use problems and not NEET) among participants who had self harmed was half when compared with those without a history of self harm (28% v 59%), highlighting that these adolescents are a high risk group.
