The Epidemiology of Aggression and Associated Factors among Iranian AdultPopulation: A National Survey

Background: this survey was conducted to determine the level of aggression among the iranianadult population and underlying predisposing factors.study design: a cross-sectional study.methods: this cross-sectional study included 10,957 participants, involving 23 out of the 31provinces of iran in 2019. the outcome of interest was aggression, evaluated by the buss & perryaggression questionnaire. the association between aggression and 34 demographic, behavioral,social, and cultural characteristics was assessed using simple and multiple linear regression.results: the overall mean (sd) score of aggression was 77.10 (22.53). based on the severity ofaggression, the participants were categorized into four groups as follows: 2,464 (23.1%)nonaggressive, 4,692 (43.9%) mild, 3,071 (28.8%) moderate, and 454 (4.2%) severe aggressive.aggression was more likely to occur in people with the following characteristics: younger ages,having several siblings, lower ranks of birth, having an intimate friend of the opposite sex, havingan aggressive father/mother, history of parental divorce, interest in watching action/porn movies,listening to music, history of escape from home/school, using neuropsychiatric drugs, using illicitdrugs, history of suicidal thoughts/attempt, and family conflict and hostility. aggression was lesslikely to occur with the following characteristics: reading, regular physical exercise, the ability tocontrol anger, regular prayer, adherence to avoid lying, respect to other people's rights, sexualsatisfaction, and attachment to parents.conclusions: a majority of the population has some degree of aggression. aggression is amultifactorial behavior corresponding with several demographical, social, cultural, and religiousfactors, some of which back to early childhood events.