For which strategies of suicide prevention is there evidence of effectiveness?

Despite substantial efforts in suicide prevention, it remains unclear which interventions are effective in preventing suicide.  This report published by the WHO Health Evidence Network in July 2012 looked at research findings from systematic reviews to address two questions:

Around 34 types of suicide preventive interventions were evaluated in the published systematic reviews, which covered the whole spectrum of suicide prevention efforts from prevention through to treatment and maintenance.  More than half of these interventions fell into the domain of treatment and maintenance rather than prevention.

Evidence from seven systematic reviews (rated as “average” or “good” in relation to their methodological quality) indicated that some interventions may be promising.

Website:  For which strategies of suicide prevention is there evidence of effectiveness?