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Evaluating Group Schema Day Treatment: Patient Satisfaction and Outcomes in Mixed Personality Disorders
Jenny Broersen1,2, Michiel van Vreeswijk3,4, Arjan Videler5,6
1GGZ Delfland, Delft, The Netherlands.
Journal of Clinical Psychology
|January 26, 2026
Summary
Group Schema Day Treatment (GSDT) combined with individual Schema Therapy shows high patient satisfaction and effectiveness for cluster B and C personality disorders, reducing symptoms and improving outcomes.
Area of Science:
- Psychology
- Psychiatry
- Clinical Psychology
Background:
- Cluster B and C personality disorders present complex challenges in treatment.
- Integrating group and individual therapy modalities may enhance therapeutic outcomes.
Purpose of the Study:
- To evaluate patient satisfaction and treatment outcomes of a 34-week Group Schema Day Treatment (GSDT) program combined with individual Schema Therapy.
- To assess the efficacy of this combined approach for individuals diagnosed with cluster B and C personality disorders.
Main Methods:
- A naturalistic study design involving 39 adult patients with primary diagnoses of cluster B and C personality disorders.
- Therapy outcome measures were assessed at multiple time points: pre-treatment (T0), 8 weeks (T1), 26 weeks (T2), and follow-up (T3).
Main Results:
- Patients reported significant positive changes in overall satisfaction with the GSDT program.
- Significant reductions were observed in psychological symptoms, personality disorder severity, and dysfunctional schemas (effect sizes 0.77-0.87).
- A modest increase in healthy modes was noted (effect size 0.24), with a dropout rate of 17.9%.
Conclusions:
- The combined GSDT and individual Schema Therapy program is well-accepted and highly satisfactory for patients.
- This integrated treatment approach shows potential effectiveness for mixed cluster B and C personality disorders.
- Further randomized controlled trials are recommended to confirm findings and explore cost-effectiveness.
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