Eid Jarle, Larsson Gerry, Johnsen Bjørn Helge, Laberg Jon Christian, Bartone Paul T, Carlstedt Berit
Department of Psychosocial Science, University of Bergen, Norway.
Nord J Psychiatry. 2009;63(5):426-32. doi: 10.1080/08039480903118190.
Despite the widespread use of the Impact of Event Scale to measure post-traumatic stress symptoms, psychometric evaluations of the scale have revealed mixed findings.
The aim of the present study is to provide new empirical evidence and examine the factor structure, reliability, and predictive validity of the Norwegian version of the IES-R.
Posttraumatic stress symptoms were recorded in a student sample (n=312) 3 weeks after the Southeast Asian tsunami disaster in December 2004. Confirmatory factor analyses of the IES-R behavior items using structural equation modeling (SEM) were performed on four models from existing research.
The original three-factor model of intrusion, avoidance and hyperarousal symptoms exhibited the best goodness-of-fit indices when defined as oblique. The IES-R also revealed satisfactory reliability. Symptom levels of intrusion and avoidance were moderate, while hyperarousal scores were low, with a significant gender difference.
Taken together, the IES-R revealed good psychometric properties in this nonclinical student sample and could be a useful instrument to assess and follow-up on PTSD symptoms after a certain identified trauma.
尽管事件影响量表被广泛用于测量创伤后应激症状，但对该量表的心理测量学评估结果不一。
本研究旨在提供新的实证证据，并检验挪威版IES-R的因子结构、信度和预测效度。
2004年12月东南亚海啸灾难发生3周后，对一个学生样本（n = 312）的创伤后应激症状进行记录。使用结构方程模型（SEM）对IES-R行为项目进行验证性因子分析，分析基于现有研究的四个模型。
当定义为斜交时，侵入、回避和过度唤醒症状的原始三因素模型显示出最佳的拟合指数。IES-R还显示出令人满意的信度。侵入和回避症状水平中等，而过度唤醒得分较低，存在显著的性别差异。
总体而言，IES-R在这个非临床学生样本中显示出良好的心理测量学特性，可能是评估和跟踪特定创伤后创伤后应激障碍症状的有用工具。
