Hansen, Maj and Hyland, Philip and Armour, Cherie and Shevlin, Mark and Elklit, Ask (2015) Less is more? Assessing the validity of the ICD-11 model of PTSD across multiple trauma samples. European Journal of Psychotraumatology, 6 (1). p. 28766. ISSN 2000-8066

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Abstract

Background: In the 5th edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5), the symptom profile of posttraumatic stress disorder (PTSD) was expanded to include 20 symptoms. An alternative model of PTSD is outlined in the proposed 11th edition of the International Classification of Diseases (ICD-11) that includes just six symptoms. Objectives and method: The objectives of the current study are: 1) to independently investigate the fit of the ICD-11 model of PTSD, and three DSM-5-based models of PTSD, across seven different trauma samples (N=3,746) using confirmatory factor analysis; 2) to assess the concurrent validity of the ICD-11 model of PTSD; and 3) to determine if there are significant differences in diagnostic rates between the ICD-11 guidelines and the DSM-5 criteria. Results: The ICD-11 model of PTSD was found to provide excellent model fit in six of the seven trauma samples, and tests of factorial invariance showed that the model performs equally well for males and females. DSM-5 models provided poor fit of the data. Concurrent validity was established as the ICD-11 PTSD factors were all moderately to strongly correlated with scores of depression, anxiety, dissociation, and aggression. Levels of association were similar for ICD-11 and DSM-5 suggesting that explanatory power is not affected due to the limited number of items included in the ICD-11 model. Diagnostic rates were significantly lower according to ICD-11 guidelines compared to the DSM-5 criteria. Conclusions: The proposed factor structure of the ICD-11 model of PTSD appears valid across multiple trauma types, possesses good concurrent validity, and is more stringent in terms of diagnosis compared to the DSM-5 criteria.

Item Type:	Article
Additional Information:	© 2015 Maj Hansen et al. This is an Open Access article distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), allowing third parties to copy and redistribute the material in any medium or format, and to remix, transform, and build upon the material, for any purpose, even commercially, under the condition that appropriate credit is given, that a link to the license is provided, and that you indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use. Cite as: Maj Hansen, Philip Hyland, Cherie Armour, Mark Shevlin & Ask Elklit (2015) Less is more? Assessing the validity of the ICD-11 model of PTSD across multiple trauma samples, European Journal of Psychotraumatology, 6:1, 28766, DOI: 10.3402/ejpt.v6.28766
Keywords:	CFA; PTSD; DSM-5; ICD-11; latent structure;
Academic Unit:	Faculty of Science and Engineering > Psychology
Item ID:	12692
Identification Number:	https://doi.org/10.3402/ejpt.v6.28766
Depositing User:	Philip Hyland
Date Deposited:	27 Mar 2020 16:11
Journal or Publication Title:	European Journal of Psychotraumatology
Publisher:	Taylor & Francis Open
Refereed:	Yes
URI:	Publisher
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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