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Melancholia: definitions, risk factors, personality, neuroendocrine markers and differential antidepressant response

Authors

  • Peter R. Joyce,

  • Roger T. Mulder,

  • Suzanne E. Luty,

  • Janice M. McKenzie,

  • Patrick F. Sullivan,

  • Robyn M. Abbott,

  • Isobel F. Stevens


Peter Joyce, Professor (Correspondence); Roger Mulder, Associate Professor; Suzanne Luty, Janice McKenzie, Robyn Abbott, Isobel Stevens
Department of Psychological Medicine, Christchurch School of Medicine and Health Sciences, PO Box 4345, Christchurch, New Zealand. Email: peter.joyce@chmeds.ac.nz
Patrick Sullivan, Department of Psychiatry, Virginia Commonwealth University, Richmond, Virginia, USA

Abstract

Objective:  To evaluate the CORE measure of melancholia, against the DSM-IV construct of melancholia. To evaluate the validity of both the CORE and DSM-IV constructs of melancholia against psychosocial risk factors, anxiety and personality disorder comorbidity, neuroendocrine markers and differential antidepressant response to fluoxetine and nortriptyline.

Method:  One hundred and ninety-five outpatients with major depression were evaluated for melancholia with both the DSM-IV criteria and the CORE evaluation. Both constructs were evaluated for validity against psychosocial risk factors, comorbidity, biological markers and differential antidepressant response.

Results:  The CORE measure has satisfactory interrater reliability when used dimensionally, but has unacceptably low agreement for making a categorical diagnosis of melancholia. There is remarkably poor agreement (kappa = 0.11) between the CORE and DSM-IV criteria for melancholia. Neither the DSM-IV nor CORE criteria for melancholia identified subgroups of patients with better childhood environments or less anxiety or personality disorder comorbidity. The CORE criteria for melancholia, but not DSM-IV, identified patients with neuroendocrine disturbance. CORE scores also were associated with differential responses to fluoxetine and nortriptyline, but not in anticipated directions. Thus, high CORE scores were associated with a higher recovery rate with fluoxetine than nortriptyline.

Conclusion:  While the episode specifier of melancholia should be retained in diagnostic systems, the DSM-IV criteria were not validated against any of the variables examined in this study. The CORE construct of melancholia, was validated against neuroendocrine measures, and was associated with a differential antidepressant response. However, the limits imposed by interrater reliability, suggest the CORE measure should be used dimensionally and not to make a categorical diagnosis of melancholia.

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