Psychometric properties of the dutch version of the core measure of melancholia

D. Rhebergen, D.L. Arts, H.C. Comijs, A.T.F. Beekman, C.B. Terwee, G. Parker, M.L. Stek

    Research output: Contribution to JournalArticleAcademicpeer-review


    Background: The CORE measure was designed to assess psychomotor symptoms and the probability of melancholia in depressed people. We tested the inter-rater reliability and validity of the Dutch version of the CORE. Methods: Thirty-seven elderly, depressed in-patients were studied. The CORE, Salpêtrière Retardation Rating Scale (SRRS), Quick Inventory of Depressive Symptoms-self-report version (QIDS) and Montgomery Asberg Depression Rating Scale (MADRS) were administered. The inter-rater reliability of the CORE was examined by calculating the intra-class correlation coefficient (ICC) of agreement between five independent raters. Construct validity was assessed by calculating Spearman rho (ρ) correlations between CORE and SRRS, QIDS and MADRS measure scores. Results: The ICC for total CORE scores was 0.80, while, for the CORE sub-scales the ICCs were 0.74 for non-interactiveness, 0.70 for retardation and 0.79 for agitation, indicating high inter-rater reliability. Associations between the CORE and SRRS measures supported the validity of the CORE as a measure of psychomotor disturbance, while correlations between the CORE agitation sub-scale and agitation items derived from the QIDS and MADRS were low to moderate. Limitations: Both the sample size and the comparator measures of psychomotor disturbance (especially agitation) may have compromised construct validity analyses. Conclusions: High inter-rater reliability was demonstrated for the Dutch CORE measure. Its validity as a measure of psychomotor disturbance was supported in analyses involving total CORE scores. © 2012 Elsevier B.V.
    Original languageEnglish
    Pages (from-to)343-346
    JournalJournal of Affective Disorders
    Issue number1-3
    Publication statusPublished - 2012


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