PTSD factor structure differences between veterans with and without a PTSD diagnosis
PTSD factor structure differences between veterans with and without a PTSD diagnosis
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DOI：
10.1016/j.janxdis.2012.01.008
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发表时间：
2012-04-01
影响因子：
10.3
通讯作者：
Richardson, J. Don
中科院分区：
文献类型：
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作者：
Biehn, Tracey L.;Elhai, Jon D.;Richardson, J. Don
本研究探讨了创伤后应激障碍（PTSD）因子结构在患有和未患有PTSD的退伍军人之间的差异。使用了378名创伤暴露的加拿大退伍军人（主要是男性）的档案数据集。根据结构化的诊断访谈，样本被分为符合DSM-IV PTSD标准的参与者（n= 230）和不符合标准的参与者（n=148）。通过验证性因素分析来确定哪一个实证支持的四因素PTSD模型最适合数据：(1)King, Leskin, King, and Weathers（1998）的再体验、回避、情绪麻木和高唤醒因素的情绪麻木模型，或(2)Simms, Watson, and Doebbeling（2002）的再体验、回避、不安和高唤醒因素的焦虑模型。结果表明，两种模型在无创伤后应激障碍组的拟合度稍好。一系列测量不变性检验表明，两组在除因子负荷外的所有参数上都有所不同。PTSD组有更大的截距、因子均值和残差方差，表明这些参与者有更大的PTSD严重程度，但与他们的PTSD评分相关的测量误差更大。这项研究有助于我们理解创伤后应激障碍的诊断如何在潜伏水平上影响创伤后应激障碍症状的结构。(C) 2012 Elsevier Ltd.版权所有。
This study examined differences in posttraumatic stress disorder's (PTSD) factor structure between veterans with and without a PTSD diagnosis. An archival dataset of 378 trauma-exposed Canadian veterans (mostly men) was used. The sample was divided into participants who met DSM-IV criteria for PTSD (n = 230) and those who did not (n=148), based on a structured diagnostic interview. Confirmatory factor analysis was conducted to determine which empirically supported four-factor PTSD model best fit the data: (1) King, Leskin, King, and Weathers' (1998) Emotional Numbing model of Reexperiencing, Avoidance, Emotional Numbing and Hyperarousal factors, or (2) Simms, Watson, and Doebbeling's (2002) Dysphoria model of Reexperiencing, Avoidance, Dysphoria, and Hyperarousal factors. Results indicated that both models fit slightly better in the No-PTSD group. A series of measurement invariance tests demonstrated that the two groups varied on all parameters with the exception of factor loadings. The PTSD-group had larger intercepts, factor means, and residual error variance, suggesting that these participants had greater PTSD severity but more measurement error associated with their PTSD ratings. This study contributes to our understanding of how a PTSD diagnosis impacts the structure of PTSD symptoms at the latent level. (C) 2012 Elsevier Ltd. All rights reserved.