Kuo Janice R, Christensen Katherine E, Liebman Rachel, Fitzpatrick Skye, Chapman Alexander, McMain Shelley
Department of Psychology, Toronto Metropolitan University, Toronto, Canada.
PGSP-Stanford PsyD Consortium, Palo Alto University, Palo Alto, CA, USA.
Behav Res Ther. 2025 Jul;190:104747. doi: 10.1016/j.brat.2025.104747. Epub 2025 Apr 15.
Borderline personality disorder (BPD) and posttraumatic stress disorder (PTSD) commonly co-occur. Limited research, however, has examined the association between fluctuations in the severity of one disorder with fluctuations in the severity of the other disorder. In a sample of N = 240 self-harming individuals with BPD undergoing 6 or 12 months of Dialectical Behavior Therapy (DBT), we used a cross-lagged panel model with 3-month intervals to evaluate the temporal relationship between BPD severity and PTSD severity during DBT and throughout follow-up. We similarly examined the relationship in the sub-sample meeting criteria for both disorders (BPD + PTSD; N = 81). Results indicated that decreases in PTSD severity at one timepoint corresponded with decreases in BPD severity at the subsequent timepoint, and that there was minimal evidence for the reverse relationship. Findings were consistent across our analyses in both the full BPD sample and the BPD + PTSD subsample. In the context of DBT, addressing PTSD might help reduce subsequent BPD severity, but addressing BPD features might not have similar effects on PTSD severity.
边缘型人格障碍（BPD）和创伤后应激障碍（PTSD）常常同时出现。然而，仅有有限的研究考察了一种障碍的严重程度波动与另一种障碍的严重程度波动之间的关联。在一个由240名患有BPD且有自我伤害行为的个体组成的样本中，这些个体正在接受为期6个月或12个月的辩证行为疗法（DBT），我们使用了间隔为3个月的交叉滞后面板模型，以评估DBT期间及整个随访过程中BPD严重程度与PTSD严重程度之间的时间关系。我们同样在符合两种障碍标准的子样本（BPD + PTSD；N = 81）中考察了这种关系。结果表明，一个时间点上PTSD严重程度的降低与随后时间点上BPD严重程度的降低相对应，而且几乎没有证据支持相反的关系。在完整的BPD样本和BPD + PTSD子样本的分析中，研究结果都是一致的。在DBT的背景下，解决PTSD可能有助于降低随后的BPD严重程度，但解决BPD特征可能对PTSD严重程度没有类似的影响。
