Personality disorders in bipolar and depressive disorders

Area of Science:

• Psychiatry
• Clinical Psychology
• Mental Health Research

Background:

• The comorbidity of mood disorders and personality disorders (PDs) has significant clinical, therapeutic, and prognostic implications.
• Understanding these associations is crucial for effective patient management and treatment strategies.

Purpose of the Study:

• To compare the prevalence and patterns of DSM-III-R personality disorders in patients diagnosed with depressive disorders versus bipolar disorders.
• To investigate the comorbidity of personality disorders with axis I mood disorders.

Main Methods:

• Utilized the Structured Clinical Interview for DSM-III-R Personality Disorders (SCID-II) to assess personality disorders.
• Compared PD prevalence in a cohort of 117 patients with depressive disorders and 71 patients with bipolar disorders, all recovered from a major depressive episode requiring hospitalization.

Main Results:

• Among patients with depressive disorders, Avoidant PD (31.6%), borderline PD (30.8%), and obsessive-compulsive PD (30.8%) were most prevalent.
• In the bipolar disorder group, obsessive-compulsive PD (32.4%) was most common, followed by borderline PD (29.6%) and avoidant PD (19.7%).
• Avoidant PD showed a trend towards higher prevalence in depressive disorder patients (P < 0.07).

Conclusions:

• A distinct pattern of personality disorder diagnoses emerges between patients with depressive disorders and those with bipolar disorders.
• These findings underscore the importance of assessing for specific PDs based on the type of mood disorder for tailored clinical interventions.