Attempted suicide is relatively rare under 12 years of age, although there may be isolated cases under the age of five. The repetition rate for referred attempted suicide may be estimated by the ratio of the number of suicide-attempt events to the number of people involved. In the World Health Organization (WHO) study, more than one-third of the young patients included in the study at the index-attempted suicide had a history of prior attempted-suicide behaviour. Data from the Stockholm WHO center illustrated reasons for suicide attempts. Among many young suicide attempters seen, instability in family situation and childhood circumstances was notable. A history of suicidal behavior is one of the most significant risk factors for completed suicide among adolescents. The extensive material from the WHO study on attempted suicide provides available information on the provision of aftercare treatment recommendations made to young people aged 15-19 following attempted suicide.