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Problem-solving ability and comorbid personality disorders in depressed outpatients
Rebecca Harley1, Timothy Petersen, Margaret Scalia
1Depression Clinical and Research Program, Massachusetts General Hospital, 15 Parkman Street, Boston, MA 02114, USA. rharley@partners.org
Depression and Anxiety
|July 18, 2006
Summary
Major depressive disorder (MDD) and personality disorders (PDs) impact problem-solving skills. While problem-solving improves with MDD treatment, stable PDs are linked to lower remission rates, suggesting complex interactions.
Area of Science:
- Psychiatry
- Clinical Psychology
Background:
- Major depressive disorder (MDD) is frequently comorbid with personality disorders (PDs).
- Both MDD and certain PDs are independently associated with impaired problem-solving abilities.
- The interplay between PDs, problem-solving, and MDD treatment response requires further elucidation.
Purpose of the Study:
- To investigate the relationships between PD diagnoses, problem-solving skills, and treatment outcomes in outpatients with MDD.
- To examine how PD status, before and after treatment, influences problem-solving abilities and MDD remission rates.
- To assess the impact of fluoxetine treatment on both PD symptoms and problem-solving capacity.
Main Methods:
- 312 outpatients with MDD participated in an 8-week open-label fluoxetine trial.
- Personality disorder diagnoses were assessed using structured clinical interviews pre- and post-treatment.
- The Problem-Solving Inventory (PSI) was administered at both time points to measure problem-solving skills.
Main Results:
- Prior to treatment, patients with avoidant, dependent, narcissistic, and borderline PDs reported significantly worse problem-solving than those without PDs.
- Dependent PD was uniquely associated with poorer baseline problem-solving after controlling for depression severity.
- Patients with stable PD diagnoses showed significantly lower rates of MDD remission.
- Problem-solving skills improved concurrently with MDD improvement across all groups.
- No significant differences in post-treatment problem-solving were observed between PD groups after controlling for baseline factors and treatment response.
Conclusions:
- MDD treatment with fluoxetine can improve problem-solving skills, especially as depressive symptoms remit.
- Stable personality disorders are associated with a reduced likelihood of achieving MDD remission.
- Further research is warranted to understand the causal pathways between PDs, problem-solving deficits, and treatment outcomes in MDD.