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    The International Trauma Questionnaire: development of a self‐report measure of ICD‐11 PTSD and complex PTSD


    Cloitre, Marylene and Shevlin, Mark and Brewin, Chris R. and Bisson, Jonathan I. and Roberts, Neil P. and Maercker, Andreas and Karatzias, Thanos and Hyland, Philip (2018) The International Trauma Questionnaire: development of a self‐report measure of ICD‐11 PTSD and complex PTSD. Acta Psychiatrica Scandinavica, 138 (6). pp. 536-546. ISSN 0001-690X

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    Abstract

    Objective: The purpose of this study was to finalize the development of the International Trauma Questionnaire (ITQ), a self‐report diagnostic measure of post‐traumatic stress disorder (PTSD) and complex PTSD (CPTSD), as defined in the 11th version of the International Classification of Diseases (ICD‐11). Method: The optimal symptom indicators of PTSD and CPTSD were identified by applying item response theory (IRT) analysis to data from a trauma‐exposed community sample (n = 1051) and a trauma‐exposed clinical sample (n = 247) from the United Kingdom. The validity of the optimized 12‐item ITQ was assessed with confirmatory factor analyses. Diagnostic rates were estimated and compared to previous validation studies. Results: The latent structure of the 12‐item, optimized ITQ was consistent with prior findings, and diagnostic rates of PTSD and CPTSD were in line with previous estimates. Conclusion: The ITQ is a brief, simply worded measure of the core features of PTSD and CPTSD. It is consistent with the organizing principles of the ICD‐11 to maximize clinical utility and international applicability through a focus on a limited but central set of symptoms. The measure is freely available and can be found in the body of this paper.

    Item Type: Article
    Keywords: International Trauma Questionnaire; self‐report measure; ICD‐11 PTSD; complex PTSD;
    Academic Unit: Faculty of Science and Engineering > Psychology
    Item ID: 12642
    Identification Number: https://doi.org/10.1111/acps.12956
    Depositing User: Philip Hyland
    Date Deposited: 20 Mar 2020 17:02
    Journal or Publication Title: Acta Psychiatrica Scandinavica
    Publisher: Wiley
    Refereed: Yes
    URI:

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