[Physical aggression and social class].
OBJECTIVE: Considering the increase of violence and the scarcity of informations about the relation between social class and victimization by physical aggression, a study was conducted to investigate this association. METHODS: A hospital-based case-control study. Cases and controls were recruited at a hospital, first-aid clinic, from 1/10/93 to 19/1/95. The study included 191 cases and 222 controls selected from among patients with non-violent clinical-surgical complaints, frequency-matched to cases by sex and age. Using a standardized questionnaire applied by trained interviewers, information obtained included social class, skin color, marital status, smoking habits, alcohol consumption and illicit drug use. RESULTS: Adjusting for sex and age, the risk of victimization by physical aggression was significantly higher for the subproletariat, Odds Ratio (OR) 4.20, 95% Confidence Interval (95% CI) 1.99-8.84; single (OR = 2.10) or informal union (OR = 2.62) as marital status (reference group = married); smokers of more than 10 cigarettes/day (OR = 2.75); alcohol consumption (OR = 2.08 for < or = 240 grams/week and OR = 24.05 for > 240 grams/week); and illicit drug users (OR = 3.07). After adjusting for all factors studied a significant risk remained for the subproletariat (OR = 3.28, 95% CI 1.42-7.59); single as marital status (OR = 2.05, 95% CI 1.09-3.88); and alcohol consumption (OR = 2.01, 95% IC 1.07-3.77 for < or = 240 and OR = 15.93, 95% CI 5.09-49.8 for > 240 grams/week) CONCLUSION: Social class is an important factor in the phenomenon of victimization by physical aggression, with the subproletariat deserving special attention in the strategies of intervention regarding this problem.