Cited by 62Anxiety, Depression, Psychometrics, Treatment, Cognitive ProcessesTreatment of Major DepressionMental Health Treatment and Access

Course of depression in a 10–year prospective study: Evidence for qualitatively distinct subgroups.

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Klein, Daniel N., Kotov, Roman·2016·Journal of Abnormal Psychology

Abstract

The course of depressive disorders can vary considerable, with some individuals exhibiting a chronic course and poor outcomes, while others have a more episodic course and better outcomes. However, it is unclear whether degree of chronicity is continuous or reflects qualitatively distinct subgroups. Using data from a 5-wave, 10-year, naturalistic study of 127 depressed outpatients, we examined whether depression chronicity lies on a continuum or manifests natural boundaries. Spline regression was used to test 7 continuous and discontinuous models of the relationship between depression during the first follow-up interval and multiple outcomes at subsequent follow-ups. In order to further validate the findings, we also created empirically derived subgroups based on the results of the spline regression analyses and compared them on baseline clinical characteristics and long-term outcomes. There was a clear and consistent discontinuity indicating that for higher levels of chronicity during the first 30-month period, depression was linearly related to outcome; in contrast, for lower levels of chronicity, depression in the initial interval was unrelated to subsequent outcomes. The findings were strikingly consistent across the 4 follow-up evaluations using multiple outcomes and goodness-of-fit indices. In addition, the chronic group--as defined by the first follow-up period--exhibited more baseline chronic depression, anxiety and personality disorders, family history of dysthymia, and childhood adversity, and was more likely to attempt suicide and be hospitalized during follow-up, than the nonchronic group. Results suggest that there are qualitatively distinct classes of patients with more and less chronic depressions, and support the utility of longitudinal course as a means of parsing depression into more homogeneous subgroups.

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  1. Burnham KP Anderson DR 2002 Model selection and multimodel inference: A practical information-theoretic approach 2 New York Springer-Verlag
  2. Keller MB Boland R Leon A Solomon D Endicott J Li C 2013 Clinical course and outcome of unipolar major depression Keller MB Coryell WH Endicott J Maser JD Schettler PJ Clinical Guide to Depression and Bipolar Disorder 155 173 Washington, DC American Psychiatric Press
  3. Klein DN Allmann AES 2014 Course of depression: Persistence and recurrence Gotlib IH Hammen CL Handbook of depression and its treatment 3 64 83 New York Guilford Press
  4. Klein DN Black SR in press Persistent depressive disorder DeRubeis RJ Strunk DR Oxford Handbook of Mood Disorders New York Oxford University Press
  5. Klein DN Riso LP 1993 Psychiatric diagnoses: Problems of boundaries and co-occurrences Costello CG Basic issues in psychopathology 19 66 New York Guilford Press
  6. Marsh LC Cormier DR 2001 Spline regression models Sage University Papers Series on Quantitative Applications in the Social Sciences Thousand Oaks, CA Sage Publications
  7. Spitzer RL Williams JBW Gibbon M First MB 1990 Structured Clinical Interview for DSM-III-R (SCID) Washington, DC American Psychiatric Press

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Authors
Klein, D. N., & Kotov, R.
Affiliations
Stony Brook University (US)
Venue
Journal of Abnormal Psychology
Published
2016-04
Volume
125
Issue
3
Pages
337-348
ISSN
  • 0021-843X (ISSN-L)
  • 1939-1846
OpenAlex
W2347188545
Cited by
62
References
60
Citations by year
2026: 6 · 2025: 7 · 2024: 6 · 2023: 5 · 2022: 9 · 2021: 4 · 2020: 6 · 2019: 8 · 2018: 5 · 2017: 5 · 2015: 1
FWCI
8.54
Type
journal article
Language
en
Open access
Locations
  • Journal of Abnormal Psychology (publishedVersion, other-oa)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
National Institute of Mental Health (RO1 MH45757, RO1 MH094398)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
  • Health Sciences › Medicine › Pharmacology › Treatment of Major Depression
  • Social Sciences › Psychology › Social Psychology › Mental Health Treatment and Access
Keywords
depression, chronic depression, course of depression, long-term outcomes, suicide attempts, hospitalization, childhood adversity, anxiety, personality disorders, longitudinal course
MeSH terms
Adolescent, Adult, Major Depressive Disorder, Depressive Disorder, Major, Female, Humans, Longitudinal Studies, Male, Middle Aged, Models, Theoretical, Personality, Prospective Studies, Severity of Illness Index, Suicide, Disease Progression, Young Adult, Symptom Assessment

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