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Tijdschrift voor Psychiatrie 60 (2018) 10, 662 - 671

Onderzoeksartikel

Predicting short term intramural violence with the Instrument for Forensic Treatment Evaluation (IBFE), ROM-instrument in tbs for different target groups

E. Schuringa, M. Spreen, S. Bogaerts

background The Instrument for Forensic Treatment Evaluation (ifte) has proven to be useful as an instrument for treatment evaluation and risk management in a heterogeneous group of tbs-patients (tbs = court ordered psychiatric treatment for offenders with a mental disorder). However, it is not known whether this rom-instrument is a predictor of short term inpatient violence in different tbs-groups.
aim To investigate the extent to which the factor Problematic behavior of the ifbe is useful for predicting intramural violence, taking the different target groups in tbs into account. To demonstrate the practical value of the ifte factor Problematic behavior for inpatient violence risk management.
method Using logistic regression, the predictive validity of the ifte-factor Problematic behavior for inpatient violence was established in a 4 to 8-month follow-up, taking the different target groups into account. Cut-off points based on roc analysis determined whether this factor could be of practical value for risk management.
results The factor Problematic behavior predicted inpatient violence, irrespective of the target group, with an odds ratio of 1.68. A cut-off score of 7, on a scale of 1 to 17, correctly assessed 82% of the patients as a high or low risk for inpatient violent behavior.
conclusion The factor Problematic behavior of the ifbe can contribute to the prediction of short term inpatient violence for different tbs patient groups.

keywords ifte, predictive validity, tbs