Psychosis Alters Association Between IQ and Future Risk of Attempted Suicide: Cohort Study of 1109475 Swedish men

Associations between intelligence quotients measured in early adulthood & subsequent hospital admissions for attempted suicide were explored. The role of psychosis was explored. Associations of intelligence quotient with specific methods of attempted suicide were explored. A cohort study of 1,109,475 Swedish men was conducted. 17,736 men had at least one hospital admission for attempted suicide by any means during the follow-up period. After adjustment for age & socioeconomic status, lower intelligent quotient scores were associated with an elevated risk of attempted suicide by any means. Separate analyses indicated that intelligence quotient had no marked impact on risk of attempted suicide in those with psychosis. (42 refs.) JA