[The forensic preventive outpatient clinic in Ansbach : Evaluation of the model project for treatment of psychiatric risk patients].

Background Patients suffering from severe mental disorders and who have an increased risk of violent behavior, tend to be insufficiently cared for until committing a violent offense leads to compulsory placement in a forensic psychiatric clinic. Objective The concept of the preventive outpatient clinic has been recently published in this journal. The aim of the study was to evaluate whether treatment in the outpatient clinic is preventive with respect to violence and whether there is a positive therapeutic outcome. Method The study design was quasi-experimental and longitudinal. The control group consisted of comparable patients from an adjacent healthcare catchment area. Measurements were taken on admission (t0) and after 6 and 12 months of treatment (t1 and t2, respectively). Dynamic risk factors, i.e. subscales C and R of the history clinical risk-20 version 2 (HCR-20 V2) scale and global assessment of functioning (GAF) scale were used as indicators of treatment success, involving both clinician ratings and self-reports. Multiple imputed data for 70 subjects in the experimental group and 51 in the control group were analyzed by mixed effects models with group as a fixed effect. Results The interaction effect between time and group was statistically significant for the R (risk management) subscale and the GFA values but not for the C (clinical risk) value (after Bonferroni correction), whereby controls were made for multiple testing. Conclusion The hypothesis with respect to the efficacy of the treatment could be maintained regarding risk markers and global assessment of functioning. With respect to clinical parameters there was a positive tendency in the expected direction. The data therefore indicate a positive effect of the preventive outpatient clinic for the patients treated.