The CORE system for sub-typing melancholic depression: Adaptation and psychometric properties of the Spanish version

Abstract We report the development procedure for a Spanish version of the CORE measure for subtyping melancholic depression and its psychometric properties. The sample comprised two subsets of depressive patients: 117 in-patients clinically assessed after admission and before discharge; and 34 in- a...

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Veröffentlicht in:Psychiatry research 2016-05, Vol.239, p.179-183
Hauptverfasser: Soria, Virginia, Vives, Margalida, Martínez-Amorós, Èrika, Gálvez, Verònica, Monzón, Saray, Crespo, José M, Gili, Margalida, Menchón, José M, Roca, Miquel, Parker, Gordon, Urretavizcaya, Mikel
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Sprache:eng
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Zusammenfassung:Abstract We report the development procedure for a Spanish version of the CORE measure for subtyping melancholic depression and its psychometric properties. The sample comprised two subsets of depressive patients: 117 in-patients clinically assessed after admission and before discharge; and 34 in- and out-patients who were video-recorded, with each recording being rated by independent raters and re-rated six months later. The internal consistency of the Spanish version of the CORE was high, with Cronbach's alpha coefficient of 0.93 for the total CORE score. High intra-class correlation coefficient for the total score (0.96) and the three subscales (around 0.8) indicate high inter-rater reliability. Baseline and six-month ratings of video-recordings showed high test-retest reliability. Regarding construct validity, the correlation between the CORE and the Newcastle endogeneity scale scores was 0.64. A ROC curve generated an optimal cut-off of 10 to predict the definition of endogeneity/melancholia based on the Newcastle score >=6 and the DSM-IV-TR definition of melancholia. The comparison between the CORE scores at admission and at discharge revealed large differences, indicating demonstrable sensitivity to change. The Spanish version of the CORE system is a reliable and valid instrument for sub-typing depression in terms of melancholic versus non-melancholic sub-types.
ISSN:0165-1781
1872-7123
DOI:10.1016/j.psychres.2016.03.024