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The international trauma questionnaire (ITQ) measures reliable and clinically significant treatment-related change in PTSD and complex PTSD
European Journal of Psychotraumatology ( IF 5.783 ) Pub Date : 2021-06-22 , DOI: 10.1080/20008198.2021.1930961
Marylène Cloitre 1, 2 , Philip Hyland 3, 4 , Annabel Prins 1, 2 , Mark Shevlin 5
Affiliation  

ABSTRACT

Background: The International Trauma Questionnaire (ITQ) is a validated measure that assesses ICD-11 posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD). An important task is to determine whether the ITQ is an appropriate evaluative measure for clinical trials.

Objective: To assess the psychometric properties of the ITQ in the context of treatment and determine if the ITQ measures reliable and clinically significant change over the course of a psychosocial intervention.

Method: Analyses were based on data from an online skills training programme delivered to 254 U.S. Veterans. Reliability and validity of the ITQ scores were assessed at baseline. Changes in symptom scores and probable diagnostic rates were compared at pre-, mid- and post-treatment. A reliable change index (RCI) score was computed to classify participants as improved, unchanged, or worsened. The PCL-5 was used as a comparison measure.

Results: Baseline concurrent and factorial validity was similar to previous studies. Internal consistency at each assessment was excellent and comparable to the PCL-5. Decline in symptoms from pre-to-post-treatment was significant for PTSD and CPTSD symptom profiles. Rate of probable disorder (PTSD or CPTSD) declined significantly from pre-treatment to post-treatment. Pre-to-post treatment declines exceeded the critical RCI values for the ITQ. Clinically significant changes were observed where most participants improved, some stayed the same, and few worsened. The performance of the ITQ was consistent with the PCL-5 regarding sensitivity to change.

Conclusion: This study provides the first demonstration that the ITQ measures reliable and clinically significant treatment-related change of ICD-11 PTSD and CPTSD symptoms.



中文翻译:

国际创伤问卷 (ITQ) 测量 PTSD 和复杂 PTSD 中可靠且具有临床意义的治疗相关变化

摘要

背景:国际创伤问卷 (ITQ) 是一种经过验证的评估 ICD-11 创伤后应激障碍 (PTSD) 和复杂 PTSD (CPTSD) 的方法。一项重要任务是确定 ITQ 是否是临床试验的适当评估指标。

目的:评估治疗背景下 ITQ 的心理测量特性,并确定 ITQ 是否衡量了社会心理干预过程中可靠且临床上显着的变化。

方法: 分析基于为 254 名美国退伍军人提供的在线技能培训计划的数据。ITQ 分数的可靠性和有效性在基线时进行了评估。比较治疗前、中期和治疗后症状评分和可能诊断率的变化。计算出可靠的变化指数 (RCI) 分数,以将参与者分类为改善、不变或恶化。PCL-5用作比较量度。

结果:基线同时效度和因子效度与之前的研究相似。每次评估的内部一致性都非常好,可与 PCL-5 相媲美。从治疗前到治疗后症状的下降对于 PTSD 和 CPTSD 症状特征是显着的。从治疗前到治疗后,疑似疾病(PTSD 或 CPTSD)的发生率显着下降。治疗前后的下降超过了 ITQ 的临界 RCI 值。观察到临床上显着的变化,其中大多数参与者有所改善,一些保持不变,少数恶化。ITQ 的性能与 PCL-5 对变化的敏感性一致。

结论:本研究首次证明 ITQ 测量 ICD-11 PTSD 和 CPTSD 症状的可靠且临床显着的治疗相关变化。

更新日期:2021-06-22
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