Suicide is a serious public health problem in the European Region, where rates vary from about 40 per million people (in Greece) to about 400 per million (in Hungary). Suicide rates among adolescents and young adults have also increased considerably over the last decades. Many widely-used suicide prevention programmes have never been scientifically assessed, thus making it uncertain which are effective. The objective of this report is to synthesize research findings from systematic reviews to address this question.