Paper Title
Suicide Attempt Among Substance users: Do Aggression and Multiple Substance use have an Interaction Effect on Suicide Attempt?

Background:Suicide attempt is more common among substance users than general population. However there are several risk factors effect suicide attempt in this population. One of those risk factors are multiple drug use and aggression. However, it is unclear how aggression and multiple drug use, and their interaction are associated with suicide attempts among substance users. For this reason this study aimed to fill this gap in the literature. Methods: It was studied with 257 participants who completed the socio-demographic form (including substance use and suicide attempt history) and Hostility Scale to assess the aggression. Results: To find the predictive variable of suicide attemptslogistic regression analysis was conducted. The analysis indicate that the best predictors of suicide attempt was having friends withsubstance use behavior in childhood of adolescent period(OR = 2.66, p = .04), having substance users in family members (OR = .74, p = .04) and aggression (OR = .85, p = .01); but there was no a significant interaction between multiple drug use and aggression on suicide attempt. Conclusion:It is clear that anger is an important risk factor for suicide attempts. For this reason, it is recommended that anger management based studies should be carry out to prevent suicidal behavior among substance users. Keywords - Suicide Attempt, Multiple Drug Use, Aggression, Substance Use, Drug.