SUICIDE RISK-FACTORS AMONG AUSTRALIAN VIETNAM ERA DRAFTEES

The cohort of all Australian former army conscripts of the Vietnam con flict ea was followed from 1965 to 1982 to determine mortality rates a nd causes of death following completion of their National Service. Sui ciders were compared with a random sample of survivors using informati on contained in their military documents in a nested case-control stud y. Their military document information was recorded before men were se lected for Vietnam service and is uncontaminated by ''recall bias.'' S uicide victims had lower mean scores on the army general intelligence and mechanical comprehension tests, were less likely to have continued education beyond high school, were less likely to be employed in whit e-collar or skilled blue-collar jobs between leaving school and being drafted, and more likely to have volunteered for the draft. They were more Likely to have committed a civilian offense before joining the ar my, more likely to have gone absent without leave (AWOL), and more lik ely to have committed other offenses during military service. Suicider s were more likely to have a history of diagnosis and treatment for ps ychological disorder during service and to be judged to be less than e motionally stable at discharge. Service in Vietnam was not associated with suicide. A log-linear regression model was used to analyze death rates associated with five types of variables: cognitive abilities, ed ucation, preservice employment, conduct while in service, and physical and mental health. This analysis produced a model containing only fou r variables: intelligence test score, postschool education, AWOL charg e during service, and history of diagnosis and treatment of psychologi cal problems. The difference in death rates between high scorers on th ese items and low scorers was 46-fold, from 5.2 to 240.9 per 10,000 pe rson-years.