Validation of post-traumatic stress disorder (PTSD) and complex PTSD using the International Trauma Questionnaire

Hyland, Philip, Shevlin, Mark, Brewin, Chris R., Cloitre, Marylène, Downes, A. J., Jumbe, S., Karatzias, Thanos, Bisson, Jonathan I. and Roberts, Neil (2017) Validation of post-traumatic stress disorder (PTSD) and complex PTSD using the International Trauma Questionnaire. Acta Psychiatrica Scandinavica, 136 (3). pp. 313-322. ISSN 1600-0447

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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
Subjects:	B Philosophy. Psychology. Religion > Psychology B Philosophy. Psychology. Religion > Psychology > Stress (Psychology) > Post-traumatic stress disorder
Divisions:	School of Business > Staff Research and Publications
Depositing User:	Caoimhe Ní Mhaicín
Date Deposited:	19 Jul 2017 10:21
Last Modified:	29 Aug 2017 08:35
URI:	https://norma.ncirl.ie/id/eprint/2559

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