Logistic regression was used to examine associations between self harm with and without suicidal intent at age 16 years and each of the mental health, substance use, educational, and occupational outcomes at age 18-21 years. All analyses controlled for participants’ sex. Additional multivariable analyses controlled for socioeconomic position and the number of previous depression symptoms. To obtain a direct comparison between self harm with suicidal intent and self harm without suicidal intent, we re-estimated each model with an alternative reference group to provide this additional information. There was little evidence to suggest that associations differed between males and females (interaction P values ranged from 0.12 to 0.95), therefore our analyses are based on the sexes combined. All analyses were conducted using Stata version 12.
