Original ArticlesThe Factorial Invariance Across Gender of Three Well-Supported Models Further Evidence for a Five-Factor Model of Posttraumatic Stress DisorderWang, Mengcheng PhD*; Armour, Cherie PhD†; Li, Xiaomin PhD‡; Dai, Xiaoyang PhD, MD§; Zhu, Xiongzhao PhD, MD*; Yao, Shuqiao PhD, MD*Author Information *Medical Psychological Institute, Second Xiangya Hospital, Central South University, Changsha, China; †National Centre for Psychotraumatology, University of Southern Denmark, Odense Campus, Funnen, Odense, Denmark; ‡Hong Kong Institute of Education, Hong Kong; and §Department of Psychology, Shenzhen University, Shenzhen, China. Send reprint requests to Shuqiao Yao, PhD, MD, Medical Psychological Institute, Second Xiangya Hospital, Central South University, 139 Ren-Min Zhong Rd, Changsha, 410011, China. E-mail: [email protected]. The Journal of Nervous and Mental Disease: February 2013 - Volume 201 - Issue 2 - p 145-152 doi: 10.1097/NMD.0b013e31827f627d Buy Metrics Abstract Three well-supported latent models of posttraumatic stress disorder (PTSD; i.e., Emotional Numbing, Dysphoria, and Dysphoric Arousal [DA] models) were examined using factorial invariance across gender. There is a notable lack of studies that have investigated the factorial invariance of the PTSD models across gender, and, to date, no study has assessed the factorial invariance of the DA model across gender. The current sample consisted of 571 children and adolescent earthquake survivors (297 male and 274 female participants) from China. The results indicated that the 17 symptoms of PTSD have equivalent factor loadings between the male and female participants. Furthermore, the female participants evidenced more severe manifestations of PTSD. Moreover, the newly proposed five-factor DA model provided superior fit to the data compared with the Emotional Numbing and Dysphoria models. The implication of these results is discussed. © 2013 Lippincott Williams & Wilkins, Inc.