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<p>Borderline personality disorder (BPD) is a heterogeneous condition with vastly different symptom combinations. Characterizing how BPD symptoms change during treatment can facilitate the identification of distinct treatment responses in this population. Method: We applied latent growth mixture modeling to identify and characterize distinct classes of symptom trajectories among adult patients with BPD receiving BPD Compass, a weekly, individual, personality-based cognitive-behavioral treatment for BPD. Results: Two distinct BPD symptom trajectories were identified: a low BPD class (<i>n</i> = 64; 70.3%) and a high BPD class (<i>n</i> = 24; 26.4%). Both classes significantly improved, with the high BPD class showing a steeper slope of improvement. The low BPD class reported less severe BPD symptoms at baseline and throughout treatment than the high BPD class. At baseline, the high BPD class reported significantly higher symptom severity and maladaptive personality dimensions measures across all measures. At post-treatment, the high BPD class reported significantly higher symptom severity and maladaptive personality dimensions across nearly all measures. Conclusion: Regardless of baseline severity, BPD Compass was effective in reducing BPD symptoms. This result may provide information to clinicians regarding the impact of BPD Compass as a function of baseline severity.</p>

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Latent Classes of Symptom Trajectories in a Brief Treatment for Borderline Personality Disorder

  • 期刊论文

  • 发表日期：

    2026年5月7日

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  • Douglas R. Terrill,
  • Matthew W. Southward,
  • Sarah Cecil,
  • Shannon Sauer-Zavala

摘要

Borderline personality disorder (BPD) is a heterogeneous condition with vastly different symptom combinations. Characterizing how BPD symptoms change during treatment can facilitate the identification of distinct treatment responses in this population. Method: We applied latent growth mixture modeling to identify and characterize distinct classes of symptom trajectories among adult patients with BPD receiving BPD Compass, a weekly, individual, personality-based cognitive-behavioral treatment for BPD. Results: Two distinct BPD symptom trajectories were identified: a low BPD class (n = 64; 70.3%) and a high BPD class (n = 24; 26.4%). Both classes significantly improved, with the high BPD class showing a steeper slope of improvement. The low BPD class reported less severe BPD symptoms at baseline and throughout treatment than the high BPD class. At baseline, the high BPD class reported significantly higher symptom severity and maladaptive personality dimensions measures across all measures. At post-treatment, the high BPD class reported significantly higher symptom severity and maladaptive personality dimensions across nearly all measures. Conclusion: Regardless of baseline severity, BPD Compass was effective in reducing BPD symptoms. This result may provide information to clinicians regarding the impact of BPD Compass as a function of baseline severity.