2017-06-292026-03-272017-06-292016Mercedes Simoni Nieves0803-948810.3109/08039488.2016.1159330http://dx.doi.org/10.3109/08039488.2016.1159330https://repositorio.inprf.gob.mx/handle/123456789/4403Introduction: Assessing dangerousness to gauge the likelihood of future violent behaviour has become an integral part of clinical mental health practice in forensic and non-forensic psychiatric settings, one of the most effective instruments for this being the Historical, Clinical and Risk Management-20 (HCR- 20). Objective: To examine the HCR-20 factor structure in Mexican psychiatric inpatients and to obtain its predictive validity and reliability for use in this population. Method: In total, 225 patients diagnosed with psychotic, affective or personality disorders were included. The HCR-20 was applied at hospital admission and violent behaviours were assessed during psychiatric hospitalization using the Overt Aggression Scale (OAS). Construct validity, predictive validity and internal consistency were determined. Results: Violent behaviour remains more severe in patients classified in the high-risk group during hospitalization. Fifteen items displayed adequate communalities in the original designated domains of the HCR-20 and internal consistency of the instruments was high. Conclusion: The HCR-20 is a suitable instrument for predicting violence risk in Mexican psychiatric inpatients.engAcceso CerradoAdultAggression/psychologyFemaleForecastingHospitalizationHospitals, PsychiatricHumansInpatients/psychologyMaleMental Disorders/diagnosisMental Disorders/epidemiologyMental Disorders/psychologyMexico/epidemiologyMiddle AgedPopulation GroupsReproducibility of ResultsRisk Management/methodsViolence/psychologyYoung AdultArtículo1502-47256Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz456-461Inglaterra70AssessmentMental disordersValidationViolence risk