Violence at work is a major concern in healthcare services. Prevention programs have been implemented, albeit being scarce in Italy.The Bolzano psychiatric department adopted a de-escalation model developed by the Institut-für-Professionelles-Deeskalations-Management (ProDeMa®). It includes evaluation, prevention, and practical training aimed at preventing/reducing patients’ aggressive behavior toward healthcare workers.In 2015, health professionals were interviewed by using a ProDeMa® 11-item questionnaire that assessed the type and frequency of endured patients’ aggressive behavior, as well as the conditions capable of producing or preventing it. One-way ANOVA with Tukey post-hoc test was used for comparisons.A total of 165/211 (78%) surveyed workers (mean age±DE=44.9±7.7; females=64.6%) completed the questionnaire, of whom 21% employed at the inpatients unit (INP), 37% at the outpatients unit (OUTP), 42% at the rehabilitation facility (REHAB). The one-year number of verbal aggressions (VA) was 9766, with INP (mean±SD=15.2±29.6) vs. OUTP (mean±SD=6.2±30.6) vs. REHAB (mean±SD=8.4±26.1). The one-year number of physical aggressions (PA) was 1502, with INP (mean±SD=3.3±12.2) vs. OUTP (mean±SD=0.1±0.5) vs. REHAB (mean±SD=0.1±0.7). The one-year number of injuries (IN) was 200, with INP (mean±SD=0.5±1.9) vs. OUTP (mean±SD=0.1±0.5) vs. REHAB (mean±SD=0.1±0.2). ANOVA showed significant differences in terms of mean verbal/physical aggression and injuries among the three workplaces (P-values=0.000), with post-hoc Tukey test showing a significant difference of INP vs. REHAB and OUTP. The most frequent risk factors identified by the staff for precipitating aggression included rigid rules (15.1%) and inadequate communication (9.1%).The three types of violence are common in all facilities of our Department.