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


    Hyland, Philip and Shevlin, Mark and Brewin, Chris R. and Cloitre, Marylene and Downes, A. J. and Jumbe, Sandra and Karatzias, Thanos and Bisson, Jonathan I. and Roberts, Neil P. (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 0001-690X

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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
    Keywords: post‐traumatic stress disorder; complex post‐traumatic stress disorder; ICD‐11; DSM‐5; stress‐related disorders; anxiety and depression;
    Academic Unit: Faculty of Science and Engineering > Psychology
    Item ID: 11574
    Identification Number: https://doi.org/10.1111/acps.12771
    Depositing User: Philip Hyland
    Date Deposited: 01 Nov 2019 17:31
    Journal or Publication Title: Acta Psychiatrica Scandinavica
    Publisher: Wiley
    Refereed: Yes
    URI:

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