During the two - year research, conducted at the Center of forensic psychiatry at Special Psychiatric Hospital Gornja Toponica, from 2003 - 2005., following sociodemographic variables have been studied at in - mate forensic patients: age, origin (from town or village), education, duration of hospitalization, previous hospital treatments, previous criminal records and heredity.

Research included 170 in - mate forensic patients and 67 other psychiatric patients (that were divided in two control groups: control group of schizophrenic patients and control group of patients with alcoholism). During one - year period of follow - up, we investigated possible connection between some of quoted characteristics and violent behavior that took place during the hospitalization (institutionally).

Following statistic methods have been used: variance analysis (ANOVA test), Tamhane' s test of multiple comparation, univariate and multivariate logistic regression. Results of study show greater representation of patients with low educational level and village origin in group of forensic patients on hospital security measures (unlimited duration). Earlier aggressive behavior, criminal record and greater number of previous hospitalizations is represented widely at the group of forensic patients, compared with control groups. Following sociodemographic variables show significant correlation with institutional aggressive behavior: previous criminal record and low educational level, together with leading psychopathological syndrome. Other studied variables were not correlated with risks for aggressive behavior in this study.