Evolutionary Systems Therapy for Obsessive-Compulsive Personality Disorder: A Five-Case Series.

Area of Science:

• Psychiatry and Psychology
• Clinical Psychology
• Psychotherapy Research

Background:

• Obsessive-compulsive personality disorder (OCPD) is the most prevalent personality disorder.
• Effective psychotherapeutic interventions for OCPD remain insufficiently understood.
• There is a need for novel treatment approaches for OCPD.

Purpose of the Study:

• To evaluate the effectiveness and feasibility of evolutionary systems therapy (EST) for adults diagnosed with OCPD.
• To assess changes in personality pathology, anxiety, depression, perfectionism, self-criticism, and overcontrol.
• To examine the maintenance of treatment gains at follow-up.

Main Methods:

• A case series design was employed with five adult participants diagnosed with OCPD.
• Participants received 6 months of evolutionary systems therapy (EST).
• Primary outcomes (personality pathology) were assessed monthly; secondary outcomes (anxiety, depression, etc.) were assessed at baseline and end of treatment. Feasibility was also evaluated.

Main Results:

• All participants demonstrated reliable changes and achieved remission from OCPD diagnosis after 6 months of EST.
• Symptom improvements were sustained at 1-month and 3-month follow-ups.
• The intervention was feasible, with good completion and attendance rates and no reported adverse events.

Conclusions:

• Evolutionary systems therapy (EST) appears to be a potentially effective treatment for obsessive-compulsive personality disorder (OCPD).
• EST demonstrated significant improvements in primary and secondary outcomes, with sustained effects.
• Further research is warranted to confirm the acceptability and efficacy of EST in larger, controlled trials for OCPD.