Introduction

Deliberate self harm ranges from behaviours with no suicidal intent (but with the intent to communicate distress or relieve tension) through to suicide. Some 7%-14% of adolescents will self harm at some time in their life, and 20%-45% of older adolescents report having had suicidal thoughts at some time.

Suicide

Suicide occurs relatively rarely under the age of 15 years, although prevalence is likely to be underestimated because of reluctance of coroners to assign this verdict. A large proportion of open verdicts (“undetermined cause”) are, in fact, suicides. Suicide rates are far higher in male than female adolescents. Until the past five or six years in England and Wales suicide rates were rising substantially in 15-19 year old and 20-24 year old young men, but then they began to fall somewhat in the older age group. The lack of change in female suicide rates may reflect differential effects of social change on gender roles.

Psychological postmortem studies of suicides show that a psychiatric disorder (usually depression, rarely psychosis) is present at the time of death in most adolescents who die by suicide. A history of behavioural disturbance, substance misuse, and family, social, and psychological problems is common. There are strong links between suicide and previous self harm: between a quarter and a half of those committing suicide have previously carried out a non-fatal act.