National Centre for Psychotraumatology, University of Southern Denmark, Odense, Denmark.
J Anxiety Disord. 2012 Mar;26(2):368-76. doi: 10.1016/j.janxdis.2011.12.002. Epub 2011 Dec 13.
Posttraumatic stress disorder's (PTSD) latent structure has been widely debated. To date, two four-factor models (Numbing and Dysphoria) have received the majority of factor analytic support. Recently, Elhai et al. (2011) proposed and supported a revised (five-factor) Dysphoric Arousal model. Data were gathered from two separate samples; War veterans and Primary Care medical patients. The three models were compared and the resultant factors of the Dysphoric Arousal model were validated against external constructs of depression and anxiety. The Dysphoric Arousal model provided significantly better fit than the Numbing and Dysphoria models across both samples. When differentiating between factors, the current results support the idea that Dysphoric Arousal can be differentiated from Anxious Arousal but not from Emotional Numbing when correlated with depression. In conclusion, the Dysphoria model may be a more parsimonious representation of PTSD's latent structure in these trauma populations despite superior fit of the Dysphoric Arousal model.
创伤后应激障碍（PTSD）的潜在结构一直存在广泛争议。迄今为止，两种四因素模型（麻木和烦躁）得到了大多数因素分析的支持。最近，Elhai 等人（2011 年）提出并支持了一个经过修订的（五因素）烦躁警觉模型。数据来自两个独立的样本：退伍军人和初级保健医疗患者。比较了这三个模型，并将烦躁警觉模型的结果因素与抑郁和焦虑的外部结构进行了验证。在两个样本中，烦躁警觉模型的拟合优度均明显优于麻木和烦躁模型。在区分因素时，目前的结果支持这样一种观点，即烦躁警觉可以与焦虑警觉区分开来，但与抑郁相关时，不能与情感麻木区分开来。总之，尽管烦躁警觉模型的拟合优度更高，但在这些创伤人群中，烦躁模型可能更简洁地代表 PTSD 的潜在结构。
