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This paper examines comorbidity among depressive symptoms, conduct problems, and alcohol and drug abuse, in a sample of 1050 junior and senior high school students. Adolescents reporting high levels of depression along with either alcohol abuse or conduct problems were more likely to have made a suicide attempt than were adolescents reporting only one of these disorders. Adolescents reporting comorbid drug abuse plus either depression or conduct problems were more likely to have made a prior suicide attempt than those reporting only depression or conduct problems without drug abuse. The findings are discussed in the context of the literature on comorbidity and suicide attempts in community and clinical samples.