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Validation of Posttraumatic Stress Disorder (PTSD) and Complex-PTSD using the International Trauma Questionnaire

Hyland, Philip, Shevlin, Mark, Brewin, Chris R., Cloitre, Marylene, Downes, Anthony, Jumbe, Sandra, Karatzias, Thanos, Bisson, Jonathan Ian ORCID: https://orcid.org/0000-0001-5170-1243 and Roberts, Neil 2017. Validation of Posttraumatic Stress Disorder (PTSD) and Complex-PTSD using the International Trauma Questionnaire. Acta Psychiatrica Scandinavica 136 (3) , pp. 313-322. 10.1111/acps.12771

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Abstract

Objective The 11th version of the International Classification of Diseases (ICD-11) has proposed two related trauma diagnoses: Post-traumatic stress disorder (PTSD) and Complex PTSD (CPTSD). Using a newly developed, disorder-specific measure of PTSD and CPTSD called the International Trauma Questionnaire (ITQ) the current study will (i) assess the factorial validity of ICD-11 PTSD and CPTSD; (ii) provide the first test of the discriminant validity of these constructs; and (iii) provide the first comparison of ICD-11, and Diagnostic and Statistical Manual, Fifth Edition (DSM-5), PTSD diagnostic rates using disorder-specific measures. Method ICD-11 and DSM-5 PTSD-specific measures were completed by a British clinical sample of trauma-exposed patients (N = 171). The structure and validity of ICD-11 PTSD and CPTSD were assessed by means of factor analysis and assessing relationships with criterion variables. Results Diagnostic rates under ICD-11 were significantly lower than those under DSM-5. A two-factor second-order model reflecting the distinction between PTSD and CPTSD best represented the data from the ITQ; and the PTSD and CPTSD factors differentially predicted multiple psychological variables. Conclusion The factorial and discriminant validity of ICD-11 PTSD and CPTSD was supported, and ICD-11 produces fewer diagnostic cases than DSM-5.

Item Type: Article
Date Type: Publication
Status: Published
Schools: Medicine
MRC Centre for Neuropsychiatric Genetics and Genomics (CNGG)
Publisher: Wiley-Blackwell
ISSN: 0001-690X
Date of First Compliant Deposit: 11 July 2017
Date of Acceptance: 19 June 2017
Last Modified: 04 Nov 2022 03:44
URI: https://orca.cardiff.ac.uk/id/eprint/102266

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