[Inpatient violence: frequency, risk factors, preventive strategies].

In contrast to Angloamerican and Scandinavian countries inpatient violence was not regarded as a problem in German-speaking countries for a long time. Only recently it has become a topic of increasing interest for clinical practice and research, whereby the present data exhibit significant parallels to the international development. After the discussion of methodological problems (e. g. varying definitions, sources of information, ways of registration) the paper presents the current state of knowledge about inpatient violence:Underestimation in general, mainly with respect to female patients; only a few patients are responsible for the majority of assaults; victims are rather staff members than fellow patients; discrepancy between the mostly minor physical, though major emotional consequences for victims; considerably negative effects on patient-staff interactions and ward climate. Aside from patient-related actuarial and dynamic risk factors (social origin, previous history of aggressive behaviour, dissocial personality traits and - partly - diagnoses, acute intoxication, substance abuse, lack of insight and compliance, psychotic symptoms) external/contextual factors as patient-staff ratio, ward size, structure and climate, staff-attitudes, recognition of early warning signs and handling of risk situations are of major importance for the frequency and severity of incidents. Intervention and prevention strategies are focussing - aside from medication - on the aforementioned staff-related factors and patient-staff interactions. They are the principal basis for sufficient inpatient treatment beyond the problem of violence.