Roberts, Neil P;
Hyland, Philip;
Fox, Robert;
Roberts, Alice;
Lewis, Catrin;
Cloitre, Marylene;
Brewin, Chris R;
... Bisson, Jonathan I; + view all
(2025)
The International Trauma Interview (ITI): development of a semi-structured diagnostic interview and evaluation in a UK sample.
European Journal of Psychotraumatology
, 16
(1)
, Article 2494361. 10.1080/20008066.2025.2494361.
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Abstract
Background: The International Trauma Interview (ITI) is a structured clinician-administered measure developed to assess posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) as defined in the 11th version of the International Classification of Diseases (ICD-11). This study aimed to investigate a psychometric evaluation of the ITI and to finalise the English language version. / Method: The latent structure, internal consistency, interrater agreement, and convergent and discriminant validity were evaluated with data from a convenience sample, drawn from an existing research cohort, of 131 trauma exposed participants from the United Kingdom reporting past diagnosis for PTSD or who had screened positively for traumatic stress symptoms. A range of self-report measures evaluating depression, panic, insomnia, dissociation, emotion dysregulation, negative cognitions about self, interpersonal functioning and general wellbeing were completed. / Results: Confirmatory factor analysis supported an adjusted second-order two-factor model of PTSD and disturbances in self-organisation (DSO) symptoms, allowing affect dysregulation to also load onto the PTSD factor, over alternative models. The ITI scores showed acceptable internal consistency, and interrater reliability was strong. Findings for convergent and discriminant validity were mostly as predicted for PTSD and DSO domains. Correlations with the ITQ were good but coefficients for the level of agreement of PTSD diagnosis and CPTSD diagnosis between the ITI and the ITQ were weaker, and item level agreement was variable. / Conclusion: Results provide support for the reliability and validity of the ITI as a measure of ICD-11 PTSD and CPTSD. Final revisions of the ITI are described.
| Type: | Article |
|---|---|
| Title: | The International Trauma Interview (ITI): development of a semi-structured diagnostic interview and evaluation in a UK sample |
| Location: | United States |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1080/20008066.2025.2494361 |
| Publisher version: | https://doi.org/10.1080/20008066.2025.2494361 |
| Language: | English |
| Additional information: | Copyright © 2025 The Author(s). Published by Informa UK Limited, trading as Taylor & Francis Group. This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
| Keywords: | International Trauma Interview, PTSD, complex PTSD, confirmatory factor analysis, International Trauma Questionnaire |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Brain Sciences > Div of Psychology and Lang Sciences > Clinical, Edu and Hlth Psychology |
| URI: | https://discovery-pp.ucl.ac.uk/id/eprint/10208202 |
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