Baseline thyroid indices and the subsequent response to citalopram treatment, a pilot study
Version of Record online: 18 JAN 2013
© 2013 The Authors. Brain and Behavior published by Wiley Periodicals, Inc.
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Brain and Behavior
Volume 3, Issue 2, pages 89–94, March 2013
How to Cite
Abulseoud, O. A., Gitlin, M., Altshuler, L. and Frye, M. A. (2013), Baseline thyroid indices and the subsequent response to citalopram treatment, a pilot study. Brain and Behavior, 3: 89–94. doi: 10.1002/brb3.109
- Issue online: 14 MAR 2013
- Version of Record online: 18 JAN 2013
- Manuscript Accepted: 30 OCT 2012
- Manuscript Revised: 13 OCT 2012
- Manuscript Received: 5 JUL 2012
- American Foundation of Suicide Prevention (AFSP)
- antidepressant response;
- free thyroxine;
- thyroid-stimulating hormone;
The lack of reliable outcome predictors and the delayed onset of therapeutic response to antidepressants are among the clinical challenges in the treatment of depression. Identifying clinical correlates associated with antidepressant response would reduce symptom severity and morbidity for patients with depression. Twenty-three subjects with major depression were treated with citalopram 20 mg/day in a 6-week open trial and were also simultaneously randomized to either adjunctive triiodothyronine (T3) 25 μg BID (n = 7), pindolol 5 mg BID (n = 8), or placebo (n = 8). Baseline thyroid-stimulating hormone (TSH), FT4, FT3, and TT3 were measured for potential relationships to treatment response across groups. In males only, there was a significant inverse correlation between baseline free T4 and time to response (r = −0.7, P = 0.034). In both males and females across all treatment conditions, as measured by Kaplan–Meier (K–M) maintenance failure time, baseline TSH below the mean (1.5 ng/dL) was associated with a shorter time to response (50% reduction in Montgomery and Asberg Depression Rating Scale [MADRS] score) (χ2 = 4.53, df = 1, P = 0.03). Patients with baseline TSH above the mean were less likely to reach full remission (MADRS ≤ 7) (χ2 = 4.38, df = 1, P = 0.03). No significant differences between groups emerged in the mean response time. Baseline thyroid function, as measured by serum free T4 and TSH, may predict a patient's response time to antidepressant treatment with citalopram.