
Psychosomatics 45:224-229, June 2004
© 2004 The Academy of Psychosomatic Medicine
Effect of Medical Comorbidity on Response to Fluoxetine Augmentation or Dose Increase in Outpatients With Treatment-Resistant Depression
Roy H. Perlis, M.D.,
Dan V. Iosifescu, M.D.,
Jonathan Alpert, M.D., Ph.D.,
Andrew A. Nierenberg, M.D.,
Jerrold F. Rosenbaum, M.D., and
Maurizio Fava, M.D.
Received Jan. 9, 2003; revision received Oct. 10, 2003; accepted Nov. 7, 2003. From the Depression Clinical and Research Program, Massachusetts General Hospital; and the Department of Psychiatry, Harvard Medical School, Boston. Address reprint requests to Dr. Perlis, Depression Clinical and Research Program, Massachusetts General Hospital, WACC 812, 15 Parkman St., Boston, MA 02114; rperlis{at}partners.org (e-mail).
This study assessed the effect of general medical comorbidity on response to next-step antidepressant treatments among subjects with major depressive disorder whose depression failed to respond to an 8-week open trial of 20 mg/day of fluoxetine. Of the 386 outpatients in the open trial, 101 who remained depressed were randomly assigned to double-blind treatment with either an increased dose of fluoxetine or lithium or desipramine augmentation for 4 weeks. The Cumulative Illness Rating Scale (CIRS) was used to assess baseline general medical comorbidity, and the Hamilton Depression Rating Scale was used to assess depressive symptoms. Logistic regression analysis showed that CIRS score was not associated with likelihood of remission or premature study discontinuation. Medical comorbidity thus does not appear to be associated with significantly poorer outcome among patients whose major depressive disorder failed initially to respond to an initial trial of 20 mg/day of fluoxetine.
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