The impact of borderline personality disorder symptoms on onset and course of anxiety disorders: Results of a general population study.

Borderline personality disorder (BPD) has a negative impact on the onset and course of anxiety disorders. However, even though many people with anxiety disorders only have some BPD symptoms, little is known about the impact of BPD symptoms on anxiety disorders. This study examines the impact of BPD symptoms on the onset and persistence of anxiety disorders over a 3-year follow-up in the general population. Longitudinal data from the Netherlands Mental Health Survey and Incidence study were used (N = 4,618). BPD symptoms were assessed using the International Personality Examination, and anxiety disorders and other mental disorders were assessed with the Composite International Diagnostic Interview. Logistic regression analyses were performed, adjusting for a wide range of potential confounders such as childhood abuse and mood disorders. In all, 72.1% of the participants reported no BPD symptoms, 24.0% reported one to two symptoms, 3.1% reported three to four symptoms, and 0.8% reported ≥ 5 symptoms. There was a clear dose-response relation, with more BPD symptoms being associated with a higher risk for onset and persistence of anxiety disorders (both p for trend < .001). Even one to two BPD symptoms significantly impacted the onset (odds ratio = 3.32, 95% confidence interval [1.68, 6.54]) and persistence (odds ratio = 3.12, 95% confidence interval [1.01, 9.64]). Results appeared to be independent of multiple potential confounders. Even a low number of BPD symptoms impact the onset and persistence of anxiety disorders. Targeting these symptoms may improve the outcome of anxiety disorders. Future research should study the effect of various interventions for people with anxiety disorders and BPD symptoms. (PsycInfo Database Record (c) 2023 APA, all rights reserved).