Long‐lasting symptoms in borderline personality disorder: Defining an emergent population with differential clinical and therapeutic features

Abstract Although the clinical symptoms of borderline personality disorder (BPD) tend to remit over time, a substantial proportion continues to present “long‐lasting symptoms” (LLS). This term refers to individuals who present some degree of clinical improvement, but low mood, feelings of emptiness, and poor psychosocial adjustment typically persist. The aim of this study was to compare the sociodemographic, clinical, and therapeutic variables in individuals with BPD with and without LLS. A total of 620 participants with BPD were included and subdivided into two groups: non‐LLS group ( n = 549, mean age = 28.02 [6.1] and range, 18–40 years) and LLS group ( n = 71, mean age = 44.69 [3.6] and range, 41–56 years). The groups were compared in sociodemographic, clinical, and drug treatment characteristics. We also evaluated the impact of dialectical behavioral therapy‐skills training (DBT‐ST) on polypharmacy. The prevalence of individuals with long‐lasting BPD symptoms increased significantly over a 20‐year period (from <1% to 16%). The LLS group was characterized by less clinical severity, higher comorbidity with affective disorders but lower comorbidity with eating disorders, more disability, and more medication taking. Patients with LLS who received DBT‐ST experienced a significant decrease in the use of benzodiazepines and the number of medications prescribed compared with those who did not receive DBT‐ST. Clinicians should be aware of the specific features of older patients with BPD in order to better identify and address their specific therapeutic needs.