Cited by 177Bipolar Disorder and TreatmentTreatment of Major DepressionPersonality Disorders and Psychopathology

Association between antidepressant resistance in unipolar depression and subsequent bipolar disorder: cohort study

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Li, Cheng-Ta, Bai, Ya-Mei, Huang, Yu-Lin, Chen, Ying-Sheue, Chen, Tzeng-Ji, Cheng, Ju-Yin, Su, Tung-Ping·2012·British Journal of Psychiatry

Abstract

Background: People with major depressive disorder who fail to respond to adequate trials of antidepressant treatment may harbour hidden bipolar disorder. Aims: We aimed to compare the rates of a change in diagnosis to bipolar disorder among people with major depressive disorder with stratified responses to antidepressants during an 8-year follow-up period. Method: Information on individuals with major depressive disorder identified during 2000 (cohort 2000, n = 1485) and 2003 (cohort 2003, n = 2459) were collected from a nationally representative cohort of 1 000 000 health service users in Taiwan. Participants responding well to antidepressants were compared with those showing poor responses to adequate trials of antidepressants. Results: In 7.6–12.1% of those with a diagnosis of unipolar major depressive disorder this diagnosis was subsequently changed to bipolar disorder, with a mean time to change of 1.89–2.98 years. Difficult-to-treat participants presented higher rates of change to a bipolar diagnosis (25.6% in cohort 2000; 26.6% in cohort 2003) than easy-to-treat participants (8.8–8.9% in cohort 2000; 6.8–8.6% in cohort 2003; P <0.0001). Regression analysis showed that the variable most strongly associated with the change in diagnosis was antidepressant use history. The difficult-to-treat participants were associated most with diagnostic changing (cohort 2000: odds ratio (OR) = 1.88 (95% CI 1.12–3.16); cohort 2003: OR = 4.94 (95% CI 2.81–8.68)). Conclusions: This is the first large-scale study to report an association between antidepressant response history and subsequent change in diagnosis from major depressive disorder to bipolar disorder. Our findings support the view that a history of poor response to antidepressants in unipolar depression could be a useful predictor for bipolar diathesis.

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  • Individuals prescribed multiple failed antidepressant trials (i.e., TRD) have a much greater likelihood of an underlying diagnosis of bipolar disorder as compared to persons prescribed a single antidepressant trial.

    “Indeed, it is reported that individuals prescribed multiple failed antidepressant trials (i.e., TRD) have a much greater likelihood of an underlying diagnosis of bipolar disorder as compared to persons prescribed a single antidepressant trial 157 .”

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Research works printed but not linked: 1

  1. Correa R, Akiskal H, Gilmer W, Nierenberg AA, Trivedi M, Zisook S. Is unrecognized bipolar disorder a frequent contributor to apparent treatment resistant depression? J Affect Disord 2010; 126: 10-8.

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Authors
Li, C.-T., Bai, Y.-M., Huang, Y.-L., Chen, Y.-S., Chen, T.-J., Cheng, J.-Y., & Su, T.-P.
Affiliations
  • Taipei Veterans General Hospital (TW)
  • National Yang Ming University (TW)
Corresponding author
Su, Tung-Ping
Venue
British Journal of Psychiatry
Published
2012-01
Volume
200
Issue
1
Pages
45-51
ISSN
  • 0007-1250 (ISSN-L)
  • 1472-1465
OpenAlex
W2164793282
Cited by
177
References
24
Citations by year
2026: 10 · 2025: 11 · 2024: 10 · 2023: 10 · 2022: 10 · 2021: 9 · 2020: 9 · 2019: 9 · 2018: 12 · 2017: 13 · 2016: 13 · 2015: 12 · 2014: 17 · 2013: 17 · 2012: 14
FWCI
10.50
Type
journal article
Language
en
Open access
Locations
  • The British Journal of Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Health Research Institutes
  • Taipei Veterans General Hospital
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Psychology › Clinical Psychology › Personality Disorders and Psychopathology
Keywords
antidepressant resistance, unipolar major depression, bipolar disorder, antidepressant response, diagnostic change, treatment-resistant depression
MeSH terms
Adult, Antidepressive Agents, Anxiety Disorders, Bipolar Disorder, Major Depressive Disorder, Diagnosis, Differential, Disease Susceptibility, Epidemiologic Methods, Female, Humans, Male, Middle Aged, Taiwan, Outcome Assessment, Health Care, Substance-Related Disorders, International Classification of Diseases, Depressive Disorder, Treatment-Resistant

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