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Prospective relations between melancholia and substance use disorders.
Adam M Leventhal1, Peter M Lewinsohn, Jeremy W Pettit
1Center for Alcohol and Addiction Studies, Brown University, Providence, Rhode Island 02912, USA. adam leventhal@brown.edu
The American Journal of Drug and Alcohol Abuse
|April 23, 2008
Summary
Major depressive disorder (MDD) subtypes and substance use disorders (SUDs) show complex links. Melancholic MDD and stimulant use disorders prospectively increased the risk for each other in a 6-year study.
Area of Science:
- Psychiatry
- Neuroscience
- Epidemiology
Background:
- Comorbidity between major depressive disorder (MDD) and substance use disorders (SUDs) is common.
- Understanding the specific associations between MDD subtypes and SUDs is crucial for elucidating shared mechanisms.
Purpose of the Study:
- To investigate the prospective relationships between subtypes of MDD, specifically melancholic MDD, and various SUDs.
- To determine if melancholic MDD is a risk factor for developing SUDs, and vice versa.
Main Methods:
- A cohort of 460 community-dwelling adults with a history of MDD were assessed at ages 24 and 30.
- Structured clinical interviews were used to diagnose DSM-IV mental disorders, including MDD subtypes and SUDs.
- Longitudinal analyses examined risk over a 6-year period.
Main Results:
- Stimulant use disorders were found to be prospective risk factors for melancholic MDD, and melancholic MDD was a prospective risk factor for stimulant use disorders.
- These associations remained significant even after controlling for clinical severity and chronicity.
- No robust associations were found between melancholic MDD and alcohol or cannabis use disorders.
Conclusions:
- Melancholic MDD and stimulant use disorders share a bidirectional prospective relationship.
- Findings suggest specific pathways of comorbidity that may inform targeted interventions for individuals with co-occurring melancholic depression and stimulant use issues.
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