The Norwegian Brøset-Violence-Checklist (BVC) is one of the few instruments that is suitable for short-term prediction of violence of psychiatric inpatients by nursing staff in routine care. The instrument assesses the presence or absence of six behaviours or states frequently observed before a violent incident. We conducted a study to elucidate whether the predictive properties of the BVC are retained in other psychiatric settings than the original north-Norwegian validation dataset. During their admission period, 219 consecutive patients admitted to six acute psychiatric wards were assessed as to the risk for attack using a German version of the BVC (BVC-G). Data on preventive measures were concurrently collected. Aggressive incidents were registered using an instrument equivalent to the Staff Observation of Aggression Scale (SOAS-R). Fourteen attacks towards staff were observed with incident severity ranging from 5 to 18 of a possible 22 points. BVC-G sensitivity was 64.3%, the specificity 93.9%, the positive predictive value 11.1%, and the area under the receiver operating characteristic curve 0.88. In some false positive cases intense preventive measures had been implemented. The predictive accuracy of the BVC-G proved consistent with the Norwegian original.

Violent behavior of psychiatric inpatients has grown in interest. Within the scope of a prospective study,patient assaults in six psychiatric hospitals of the Swiss Canton of Zurich were assessed during a period of 6 months, from November 1999 until May 2000. Three hundred eighty-eight of 5,251 inpatients (7.4%) were reported to act aggressively. The following risk factors for aggressive behavior were identified: male gender, younger age, unemployment, severity of mental illness, and rehospitalization. Psychiatric diagnosis was not related to aggressiveness. In spite of the detection of risk factors, a characteristic profile of aggressive psychiatric inpatients cannot be stated. Research should pay more attention to situation-specific cues for the aggressive behavior of such individuals.

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