An Examination of the Performance of the interRAI Risk of Harm to Others Clinical Assessment Protocol (RHO CAP) in Inpatient Mental Health Settings.

We study violence risk prediction at St. Joseph's Healthcare Hamilton. Data from January 2016 to December 2017 have been anonymized and collected, for a total of 870 episodes of inpatient aggressions perpetrated by 337 patients. We examine the predictive performance of a clinical indicator embedded in a mandatory assessment tool for psychiatric facilities in Ontario, the Resident Assessment Instrument for Mental Health (RAI-MH): the Risk of Harm to Others Clinical Assessment Protocol (RHO CAP). The RHO CAP's performance is studied among two groups of patients. Moreover, an analysis of the most important risk factors associated with harmful incidents is presented. The RHO CAP has demonstrated a better performance in discriminating which patients were more at risk to commit some type of aggression than at identifying the risk of harm among those who will commit aggression.