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Inter-rater reliability of the French version of the core index for melancholia

J Thuile1, C Even, S Friedman

  • 1Service de Psychiatrie, Clinique des Maladies Mentales et de l'Encéphale, Centre Hospitalier Sainte-Anne, Université Paris V René Descartes, 100 rue de la Santé, 75674 Paris Cedex 14, France. j.thuile@ch-sainte-anne.fr

Journal of Affective Disorders
|August 27, 2005
PubMed
Abstract

Insights

The French version of the CORE scale shows good to excellent reliability for assessing melancholia in major depression patients. This scale helps distinguish melancholia from other depressive disorders.

Area of Science:

  • Psychiatry
  • Clinical Psychology

Background:

  • Psychomotor disturbances are considered specific to melancholia.
  • The CORE scale assesses retardation, agitation, and non-interactivity through behavioral observation.
  • The CORE scale distinguishes melancholia from other depressive disorders.

Purpose of the Study:

  • To evaluate the inter-rater reliability of the French version of the CORE scale.
  • To establish a cut-off score for melancholia using the CORE scale.
  • To assess the agreement among psychiatrists in diagnosing melancholia.

Main Methods:

  • 35 French-speaking patients with major depression (ICD-10 criteria) were video-recorded.
  • Five psychiatrists rated the CORE scale on each patient's video recording.
  • Inter-rater reliability was assessed using the intra-class correlation coefficient (ICC) and Cohen's kappa.
  • A Receiver Operating Characteristic (ROC) curve determined the optimal cut-off score for melancholia.

Main Results:

  • The global ICC for the total CORE score was 0.88.
  • ICC values for rater pairs ranged from 0.75 to 0.97.
  • An optimal cut-off score of 5 was identified for melancholia.
  • Cohen's kappa indicated good agreement (0.65) among raters for melancholia allocation.

Conclusions:

  • The French CORE scale demonstrates good to excellent inter-rater reliability for total scores and melancholia diagnosis.
  • The scale is a reliable tool for identifying melancholia in French-speaking patients.
  • Further validation studies are recommended for research applications.

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