Determining cut-off values of Clinical Outcomes in Routine Evaluation - Outcome Measure

Erceg, Maja. (2012). Determining cut-off values of Clinical Outcomes in Routine Evaluation - Outcome Measure. Diploma Thesis. Filozofski fakultet u Zagrebu, Department of Psychology. [mentor Lauri Korajlija, Anita].

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Abstract

The aim of this study was to examine diagnostic validity of Clinical Outcomes in Routine Evaluation – Outcome Measure (CORE-OM), more specifically, we were interested in overall discriminative ability and optimal cut-off scores which distinguish participants with different degrees of psychopathology. Research was conducted on non-clinical (n=425) and two clinical samples: outpatients, clients of a counsel service from Faculty of Humanities and Social Studies Zagreb (n=123) and inpatients with diagnosis of mental disorders (n=183). We have used receiver operating characteristic (ROC) analysis in order to determine overall discriminative ability of CORE-OM, regarding the total mean score, which resulted in mathematically optimal cut-offs in differentiating between non-clinical and outpatient (1.24), non-clinical and inpatient (1.41) and outpatient and inpatient (2.38) groups of participants. We also calculated corresponding values for non-risk items and specific dimensions of CORE-OM. Gender specific sizes of AUC and different cut-offs in distinguishing groups with different degrees of psychopathology have also been found. This paper has shown satisfactory diagnostic validity of CORE-OM in differentiating between healthy individuals and individuals from clinical groups.

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