The possible reasons for the increased suicide rates among children and youth have been identified as the corresponding increase in the prevalence of depressive disorders, substance abuse and substance abuse disorders, psycho- biological changes, particularly the dramatic lowering of the age of puberty, an increase in the number of social stressors with extensive consequences for youth, and change [...] This report is aimed to update the evidence on the effectiveness of suicide prevention programs for children and youth, and analyze the elements related to the different prevention programs. [...] Alberta Heritage Foundation for Medical Research 17 Health Technology Assessment Efficacy of Suicide Prevention Programs for Children and Youth The high-risk prevention programs provided were different in many aspects: •. the purpose of the programs: One focused on presentation of factual knowledge (37) and the others (36, 38, 39) intent was to reduce depression and suicide risk behaviours, and en [...] The intent of the present review was to strictly apply the criteria for evidence of validity and reliability of the outcome measurement tools used in each of the studies. [...] For example, in the study of Silbert and Berry (37), the number of students in the experimental groups was 119 to 148, while the number of students in the control groups were only 26 to 30.