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PTSD's latent structure in Malaysian tsunami victims: Assessing the newly proposed Dysphoric Arousal model

Armour, Cherie, Raudzah Ghazali, Siti and Elklit, Ask (2013) PTSD's latent structure in Malaysian tsunami victims: Assessing the newly proposed Dysphoric Arousal model. Psychiatry Research, 206 (1). pp. 26-32. [Journal article]

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URL: http://dx.doi.org/10.1016/j.psychres.2012.09.012

DOI: doi:10.1016/j.psychres.2012.09.012

Abstract

The underlying latent structure of Posttraumatic Stress Disorder (PTSD) is widely researched. However, despite a plethora of factor analytic studies, no single model has consistently been shown as superior to alternative models. The two most often supported models are the Emotional Numbing and the Dysphoria models. However, a recently proposed five-factor Dysphoric Arousal model has been gathering support over and above existing models. Data for the current study were gathered from Malaysian Tsunami survivors (N=250). Three competing models (Emotional Numbing/Dysphoria/Dysphoric Arousal) were specified and estimated using Confirmatory Factor Analysis (CFA). The Dysphoria model provided superior fit to the data compared to the Emotional Numbing model. However, using chi-square difference tests, the Dysphoric Arousal model showed a superior fit compared to both the Emotional Numbing and Dysphoria models. In conclusion, the current results suggest that the Dysphoric Arousal model better represents PTSD's latent structure and that items measuring sleeping difficulties, irritability/anger and concentration difficulties form a separate, unique PTSD factor. These results are discussed in relation to the role of Hyperarousal in PTSD's on-going symptom maintenance and in relation to the DSM-5.

Item Type:Journal article
Keywords:PTSD, Confirmatory factor analysis, Five factor model, Dysphoric arousal, Anxious arousal, Tsunami, Natural disaster
Faculties and Schools:Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Psychology
Research Institutes and Groups:Psychology Research Institute > Population Health Sciences and Mental Health Services
Psychology Research Institute
ID Code:33101
Deposited By: Prof Cherie Armour
Deposited On:08 Mar 2016 16:28
Last Modified:08 Mar 2016 16:28

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