Redican, Enya and Nolan, Emma and Hyland, Philip and Cloitre, Marylene and McBride, Orla and Karatzias, Thanos and Murphy, Jamie and Shevlin, Mark (2021) A systematic literature review of factor analytic and mixture models of ICD-11 PTSD and CPTSD using the International Trauma Questionnaire. Journal of Anxiety Disorders, 79. p. 102381. ISSN 0887-6185

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Abstract

The 11th version of the International Classification of Diseases (ICD-11; WHO, 2018) describes two distinct trauma related disorders, Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). This review aims to summarise and synthesize evidence from factor analytic and mixture modelling studies that have investigated the latent structure of the International Trauma Questionnaire. A systematic search of PsycInfo, Web of Science, Scopus and Pubmed databases was conducted to identify relevant articles. Thirty-three studies met the inclusion criteria for this systematic review. The latent structure of the ITQ was best represented by two models; a correlated six-factor model (Re-experiencing, Avoidance, Threat, Affect Dysregulation, Negative Self Concept, and Disturbed Relationships) and a two-factor second-order model (PTSD and Disturbances in Self-Organization). Mixture model studies consistently identified distinct classes representing those displaying PTSD and CPTSD symptoms. Numerous studies demonstrated support for the factorial and discriminant validity of PTSD and CPTSD when analysed in conjunction with other variables. Overall, support was found for the conceptual coherence of PTSD and CPTSD as empirically distinguishable disorders, as measured by the ITQ. The available evidence demonstrates that the ITQ is a valid measure of ICD-11 PTSD and CPTSD. Recommendations for future research are included.

Item Type:	Article
Additional Information:	Cite as: Enya Redican, Emma Nolan, Philip Hyland, Marylene Cloitre, Orla McBride, Thanos Karatzias, Jamie Murphy, Mark Shevlin, A systematic literature review of factor analytic and mixture models of ICD-11 PTSD and CPTSD using the International Trauma Questionnaire, Journal of Anxiety Disorders, Volume 79, 2021, 102381, ISSN 0887-6185, https://doi.org/10.1016/j.janxdis.2021.102381.
Keywords:	International Trauma Questionnaire; ICD-11 CPTSD; Factor structure; Latent classes; Systematic review;
Academic Unit:	Assisting Living & Learning,ALL institute Faculty of Science and Engineering > Psychology
Item ID:	16934
Identification Number:	https://doi.org/10.1016/j.janxdis.2021.102381
Depositing User:	Philip Hyland
Date Deposited:	13 Feb 2023 15:10
Journal or Publication Title:	Journal of Anxiety Disorders
Publisher:	Elsevier
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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