RTI International, Research Triangle Park, NC 27709-2194, USA.
J Trauma Stress. 2010 Feb;23(1):91-9. doi: 10.1002/jts.20492.
Studies have not examined the factor structure or measurement invariance of posttraumatic stress disorder (PTSD) symptomatology using population-based data. Confirmatory factor analysis of the PTSD Checklist-Civilian Version (PCL-C) was conducted in a representative sample of U.S. active duty military personnel (N = 15,593). Consistent with prior research, a 4-factor model consisting of reexperiencing, avoidance, emotional numbing, and arousal factors was superior to four alternative models. Measurement invariance was found for factor loadings, but not observed item intercepts when comparing personnel with and without a recent deployment (<or=12 months). Findings indicate differences in the level of observed responses across deployment subgroups that exceed what would be expected for individuals with similar PCL latent factors scores. Implications of results are discussed.
研究尚未使用基于人群的数据来检验创伤后应激障碍（PTSD）症状的因素结构或测量不变性。使用美国现役军人的代表性样本（N=15593）对创伤后应激障碍检查表-平民版（PCL-C）进行了验证性因子分析。与先前的研究一致，由再体验、回避、情感麻木和觉醒因素组成的 4 因素模型优于四个替代模型。当比较有和没有最近部署（<=12 个月）的人员时，发现因子负荷的测量不变性，但未观察到项目截距。研究结果表明，在不同的部署亚组中，观察到的反应水平存在差异，超过了具有相似 PCL 潜在因子分数的个体的预期水平。讨论了结果的含义。
