According to a 27-year investigation conducted in Montreal by Paris and colleagues, what can be said about the prognosis of borderline personality disorder (BPD)?

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The results of the 27-year investigation conducted in Montreal by Paris and colleagues suggest that most patients with borderline personality disorder (BPD) gradually improve over time. The study found that after an average follow-up period of 14.9 years, almost three-quarters of patients (72.2%) no longer met the criteria for BPD. The study also reported low mortality rates relative to Canadian norms. Although the study did find high stability in the diagnosis of BPD, with 87.5% of patients still meeting BPD criteria at follow-up, this does not contradict the finding that most patients improve over time, as many patients may continue to exhibit some BPD traits even if they no longer meet the full criteria for diagnosis. The study did not report on drop-out rates or their impact on the interpretation of the results.

According to a 27-Year Investigation Conducted in Montreal by Paris