This document was published more than 2 years ago. The nature of the evidence may have changed.
There is no international consensus on the definition of self-harm. This report uses the same definition as e.g. the National Institute for Clinical Excellence (NICE) where self-harm includes all forms of self-harm including suicide and suicide attempts. Self-harm in adolescence is common. International prevalence estimates vary depending on the criteria and definitions applied, ranging from 5% to 42%. Given that self-harm has deleterious effects and that many adolescents do no seek help for their problems, school based prevention programs may be seen as a possible strategy to address self-harm.
The aim of this systematic review was to examine the scientific evidence for school based self-harm prevention programs. Programs could be universal, selective, indicated or the preventive intervention could be a mix of programs directed at different prevention levels. Both positive and negative effects were assessed.
The systematic review was conducted according to PRISMA guidelines. Controlled studies with or without randomisation published in English or Scandinavian languages in peer reviewed journals from 1990 could be included. Outcome measures were suicide, suicide attempts and other types of self-harm behavior. Studies measuring intentions or attitudes only were excluded. Effects had to be reported for a follow up of at least 10 weeks after the termination of the intervention. Only studies with low or moderate risk for bias were included in the evaluation of effects. The certainty of the evidence was assessed with GRADE. For assessment of negative effects no constraints on study design were applied.
Three randomised and one controlled study with acceptable risk for bias could be included. They evaluated a total of seven different programs that all investigated effects on the number of suicide attempts. Two universal programs reduced the risk of suicide attempts: Good Behavior Game (GBG) and Youth Aware of Mental Health (YAM) (See Table 1). GBG is delivered in primary school for one to two years. It is not developed for the prevention of self-harm but aims to reinforce positive behaviors and attitudes among students and teachers. It demonstrated a protective effect against future suicide attempts over longitudinal follow-up. YAM is delivered in high school and mainly consists of five hours of interactive exercises. YAM is designed specifically to prevent suicide.
Two indicated programs: Counselors Care: Assess, Respond, Empower (C-CARE) and Coping and Support Training (CAST), and one selected; Skills for Life Program for Adolescents (SEL), were investigated in a relatively small study. Accordingly, no conclusions could be drawn on the effects. Two selected programs: Screening for Professionals (Prof Screen) and Question, persuade, Refer (QPR) showed no significant effect on self-harm in one large study.
Three studies and one systematic review addressed negative effects of gate-keeper programs, screening interventions and the program Signs of Suicide. There was no evidence that the various interventions had a negative impact on the adolescents.
This systematic review found only two programs, both universal, with evidence for a preventive effect for one form of self-harm (suicide attempts), that was evaluated at 10 week follow-up. Thus, there are several important research gaps that need to be filled. Existing programs ought to be evaluated for effects on other types of self-harm, and have longer term follow-up (ideally six months). Studies investigating new self-harm prevention programs at various levels of intervention (universal, selected, indicated) as well as programs that cover the entire range of prevention levels are needed. Future studies need to include systematic monitoring of potential adverse effects of program participation.
Table 1 Summary of the results.
Number suicide attempts
|Good Behavior Game (GBG)
|RR 0.5 (0.3; 0.9)
|Youth Aware of Mental Health (YAM)
|OR 0.45 (0.24; 0.85)
CI = Confidence interval; n = Number; OR = Odds ratio; RR = Relative risk
How to cite this report: SBU. School based programs to prevent self-harm including suicide attempts. Stockholm: Swedish Agency for Health Technology Assessment and Assessment of Social Services (SBU); 2015. SBU report no 241 (in Swedish).
presents a comprehensive, systematic assessment of available scientific evidence. The certainty of the evidence for each finding is systematically reviewed and graded. Full assessments include economic, social, and ethical impact analyses.
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