Intolerance of uncertainty (IU) is the inability to tolerate distress that arises in response to the absence of important information. The level of IU has been investigated across various psychological disorders; however, few studies have examined IU in trauma-affected samples. We aimed to investigate the relationship between IU and posttraumatic stress disorder (PTSD) across the course of treatment. Participants (n = 106) had a diagnosis of PTSD and were from first responder, military, and occupational injury backgrounds. Participants completed self-report questionnaires pre- and post-engagement in an inpatient group trauma-informed psychoeducation and skills (TIPS) intervention. Regression analyses indicated that decreases in overall and inhibitory IU were associated with decreases in PTSD severity overall and at the symptom cluster level. However, prospective IU was only associated with changes in the re-experiencing, avoidance, and arousal PTSD symptom clusters. Our findings are congruent with the nascent literature indicating that IU may be a maintaining factor for PTSD, suggesting clinical relevance for attendance to IU within the course of treatment.

中文翻译：

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治疗过程中不确定性不耐受的变化可预测住院患者样本中的创伤后应激障碍症状

不确定性不容忍（IU）是无法容忍因缺乏重要信息而产生的痛苦。已对各种心理障碍的 IU 水平进行了调查；然而，很少有研究在受创伤影响的样本中检查 IU。我们旨在调查整个治疗过程中 IU 与创伤后应激障碍 (PTSD) 之间的关系。参与者（n = 106) 被诊断为 PTSD，并且来自急救人员、军人和职业伤害背景。参与者在参与住院患者团体创伤知情的心理教育和技能 (TIPS) 干预之前和之后完成了自我报告问卷。回归分析表明，总体和抑制性 IU 的降低与 PTSD 严重程度的总体降低和症状群水平的降低有关。然而，前瞻性 IU 仅与重新体验、回避和唤醒 PTSD 症状群的变化有关。我们的研究结果与新生文献一致，表明 IU 可能是 PTSD 的维持因素，表明在治疗过程中参加 IU 的临床相关性。