Department of Psychiatry, University of Vermont, Vermont Center for Children, Youth, & Families, Burlington, VT 05401, United States.
J Anxiety Disord. 2011 Apr;25(3):411-21. doi: 10.1016/j.janxdis.2010.11.004. Epub 2010 Nov 12.
A four-factor structure of posttraumatic stress disorder (PTSD) has been proposed for DSM-V based on empirical evidence that it is superior to the three-factor DSM-IV structure. However, most studies reveal multiple structures fit the data well in adolescent samples, and high factor correlations have been reported. Within two national samples of adolescents, we tested eight PTSD factor structures, which have never been compared in a single study. Confirmatory factor analyses (CFA) of PTSD symptoms were conducted in two national samples of adolescents: the National Survey of Adolescents (NSA; N = 4023) and the NSA-Replication (NSA-R; N = 3614). CFA revealed that all models provided very good fit to both samples (RMSEAs = .021-.039), though the one-factor model can be rejected, and correlations between factors were high (rs = .80-1.0). Potential interpretations of these findings include: (1) the indicators (i.e., symptoms) need refinement; or (2) relevant symptoms have yet to be identified.
创伤后应激障碍（PTSD）的四因素结构已被提议纳入 DSM-V，其依据是经验证据表明，它优于 DSM-IV 的三因素结构。然而，大多数研究表明，在青少年样本中，多种结构都能很好地拟合数据，并且报告了较高的因素相关性。在两个青少年全国样本中，我们测试了从未在单一研究中比较过的八种 PTSD 因素结构。对两个青少年全国样本（青少年全国调查[NSA]；N=4023 和 NSA 复制[NSA-R]；N=3614）进行了 PTSD 症状的验证性因子分析（CFA）。CFA 表明，所有模型都非常适合两个样本（RMSEA=.021-.039），尽管无法接受单因素模型，并且因素之间的相关性很高（rs=.80-1.0）。这些发现的潜在解释包括：（1）指标（即症状）需要改进；或（2）尚未确定相关症状。
