Objective: The purpose of this study was to describe the psychiatric treatment received by a well-defined sample of patients with borderline personality disorder and Axis II comparison
subjects over 6 years of prospective follow-up.

Method: 362 inpatients were interviewed about their treatment histories during their index admission (1992-1995). 290 patients met both Revised Diagnostic Interview for Borderlines and DSM-III-R criteria for borderline personality
disorder and 72 met DSM-III-R criteria for at least 1 nonborderline Axis II disorder (and neither criteria set for borderline personality disorder). Over 94% of surviving patients were reinterviewed about their psychiatric treatment histories 2, 4, and 6 years later.

Results: Only 33% of borderline patients were hospitalized during the final 2 years of the 6-year follow-up, a substantial decline from the 79% who had prior hospitalizations at baseline. Much the same pattern emerged for day and/or residential treatment (from 55% to 22%). In contrast, about three quarters of borderline patients were still in psychotherapy and taking psychotropic medications after 6 years of follow-up. Additionally, over 70% of borderline patients participating in these outpatient modalities did so for at least 75% of each follow-up period. While rates of intensive psychotherapy declined significantly over time (from 36% to 16%), rates of intensive polypharmacy remained relatively stable over time, with about 40% of borderline patients taking 3 or more concurrent standing medications during each follow-up period, about 20% taking
4 or more, and about 10% taking 5 or more.

Conclusions: The results of this study suggest that the majority of borderline patients continue to use outpatient treatment in a sustained manner through 6 years of follow-up, but only a declining minority use more restrictive and costly forms of treatment.