Bondjers, Kristina and Hyland, Philip and Roberts, Neil P. and Bisson, Jonathan I. and Willebrand, Mimmie and Arnberg, Filip K. (2019) Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample. European Journal of Psychotraumatology, 10 (1). p. 1665617. ISSN 2000-8066

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Abstract

Background: The recently published ICD-11 includes substantial changes to the diagnosis of posttraumatic stress disorder (PTSD) and introduces the diagnosis of Complex PTSD (CPTSD). The International Trauma Interview (ITI) has been developed for clinicians to assess these new diagnoses but has not yet been evaluated. Objectives: To evaluate the psychometric properties of the Swedish translation of the ITI by examining the interrater agreement, latent structure, internal consistency, and convergent and discriminant validity. Methods: In a prospective study, 186 adults who had experienced a potentially traumatic event were assessed with the ITI and answered questionnaires for symptoms of posttraumatic stress, other psychiatric disorders, functional disability, and quality of life (QoL). Results: The diagnostic rate was 16% for PTSD and 6% for CPTSD. Interrater agreement was satisfactory (α = .76), and confirmatory factor analysis indicated that a two-factor second-20 order model consistent with the ICD-11 model of CPTSD provided acceptable fit to the data. Composite reliability analysis demonstrated that the ITI possessed acceptable internal reliability, and associations with measures of other psychiatric disorders, insomnia, functional disability, and QoL supported the concurrent validity of the ITI. Conclusion: Swedish ITI shows promise as a clinician-administered instrument to assess and diagnose ICD-11 PTSD and CPTSD.

Item Type:	Article
Additional Information:	© 2019 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. Cite as: Kristina Bondjers, Philip Hyland, Neil P. Roberts, Jonathan I. Bisson, Mimmie Willebrand & Filip K. Arnberg (2019) Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample, European Journal of Psychotraumatology, 10:1, 1665617, DOI: 10.1080/20008198.2019.1665617
Keywords:	ICD-11; PTSD; Complex PTSD; psychometrics; factor analysis;
Academic Unit:	Faculty of Science and Engineering > Psychology
Item ID:	12227
Identification Number:	https://doi.org/10.1080/20008198.2019.1665617
Depositing User:	Philip Hyland
Date Deposited:	20 Jan 2020 16:30
Journal or Publication Title:	European Journal of Psychotraumatology
Publisher:	Taylor & Francis Open
Refereed:	Yes
URI:
Use Licence:	This item is available under a Creative Commons Attribution Non Commercial Share Alike Licence (CC BY-NC-SA). Details of this licence are available here

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