Obsessive compulsive disorder (OCD) and depression commonly co-occur. Past research has evaluated underlying mechanisms of depression in the context of other diagnoses, but few to no studies have done this within OCD.

This study examines the relationships between distress tolerance (DT), experiential avoidance (EA), depression, and OCD symptom severity across intensive/residential treatment (IRT) for OCD. It was hypothesized that all variables would be significantly moderately related and EA would emerge as a potential contributing factor to change in depression and OCD symptoms across IRT for OCD.

The sample included 311 participants with a primary diagnosis of OCD seeking IRT. Correlations were performed between all variables at both admission and discharge. A two-step hierarchical regression with change in OCD symptoms and change in DT in the first block and change in EA in the second block examined if change in EA explained change in depression above and beyond change in OCD and DT ability.

At both admission and discharge, higher EA, lower DT, and higher OCD symptom severity were significantly associated with more depressive symptoms. Change in EA explained a significant amount of variance in change in depression above and beyond change in OCD symptom severity and change in DT.

This study expands past results within an OCD sample, emphasizing EA as an important treatment target in OCD. Future studies could utilize samples from other treatment contexts, use a measure of EA specific to OCD, and utilize a longitudinal model that takes temporal precedence into account.

强迫症（OCD）和抑郁症通常同时发生。过去的研究已经在其他诊断的背景下评估了抑郁症的潜在机制，但很少或没有研究在强迫症中这样做过。

本研究探讨了强迫症强化/住院治疗 (IRT) 中的痛苦耐受 (DT)、经验回避 (EA)、抑郁和强迫症症状严重程度之间的关系。假设所有变量都显着中度相关，并且 EA 将成为强迫症 IRT 期间抑郁症和强迫症症状变化的潜在促成因素。

该样本包括 311 名初步诊断为强迫症并寻求 IRT 的参与者。在入院和出院时对所有变量进行相关性分析。一个两步层次回归与强迫症症状的变化和第一个块中的 DT 的变化以及第二个块中的 EA 的变化检查 EA 的变化是否解释了抑郁症的变化是否超过了强迫症和 DT 能力的变化。

在入院和出院时，较高的 EA、较低的 DT 和较高的强迫症症状严重程度与更多的抑郁症状显着相关。EA 的变化解释了抑郁症变化的显着差异，超出了强迫症症状严重程度的变化和 DT 的变化。

本研究扩展了 OCD 样本中过去的结果，强调 EA 作为 OCD 的重要治疗目标。未来的研究可以利用来自其他治疗环境的样本，使用针对强迫症的 EA 测量，并利用考虑时间优先级的纵向模型。