Personality organization and its association with clinical and functional features in borderline personality disorder

Patients with borderline personality disorder (BPD) show poor psychosocial functioning over the course of their lives. To date, predictors of functionality in BPD patients have remained mostly unexplored. In this study, we aimed to assess the association between personality organization and clinical and functional features in a sample of 50 patients with BPD referred to a specialized outpatient clinic. We used the Structured Interview of Personality Organization (STIPO) to assess personality organization and the Global Assessment of Functioning (GAF) scale to measure functionality. Clinical and demographic associations with personality organization were also explored. STIPO scores were negatively correlated with GAF scores (i.e. higher scores in the STIPO dimensions, which reflected greater personality pathology, were significantly associated with lower psychosocial functioning). After controlling for potential confounders, the STIPO domain "identity" significantly accounted for 26.7% of the variance in the GAF, while the STIPO subscale "sense of self" significantly accounted for 31.2% of the variance in the GAF. These findings suggest that identity and its pathological correlate, identity diffusion, may play a key role in the functional prognosis of BPD patients.