Abstract

Patients with mental disorders do not only show specific symptoms but also impairments in personality functioning, especially those with personality disorders. Recent developments in DSM-5 and ICD-11 suggest a dimensional approach to personality disorders. Few studies, however, have examined changes in personality functioning. In a large sample of 2,596 patients treated by inpatient psychodynamic therapy, changes in personality functioning were studied. Two patient groups were examined, one with (N = 1152, BPO) and one without a presumptive diagnosis of a borderline personality organization (N = 1444, NBPO). For the assessment of personality functioning, the Borderline-Personality Inventory (BPI) was used. The BPI taps personality functioning as defined by Kernberg's structural criteria of personality organization. Symptom distress and interpersonal problems were examined with the Symptom Checklist SCL-90-R and the Inventory of Interpersonal Problems (IIP). Patients were assessed at admission and discharge. In the BPO sample significant and substantial pre-post effect sizes in overall personality functioning, identity integration, and defense mechanisms/object relations were found (d = 0.68, 0.60, 0.78). In addition, large improvements in symptoms (SCL-90-R) were achieved (d = 0.97). For interpersonal problems effect sizes were medium (0.56). At discharge 36% of the BPO patients scored below the BPI-Cut-Off score for a BPO (remission). Pre-post effect sizes in the NPBO sample (N = 1444) were significant but small for changes in personality functioning (d = 0.31-0.46) and substantial for improvements in symptoms (d = 0.77). Both personality functioning and symptom distress can be substantially improved by inpatient psychodynamic therapy. Future research is recommended to study both improvements in symptoms and personality functioning.

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