BACKGROUND: School factors play important roles in adolescent suicide. However, little is known about how school climate is associated with adolescent suicide. This study examined the relationship between perceived school climate and adolescent suicidal ideation and suicide attempts, and whether these relations were explained by adolescent sleep quality. METHODS: A total of 1529 Chinese adolescents (mean age = 14.74 years; 52% boys) participated in the study. They provided self-report data on control variables, perceived school climate, sleep q...