Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample

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 y...

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Main Authors: Kristina Bondjers, Philip Hyland, Neil P. Roberts, Jonathan I. Bisson, Mimmie Willebrand, Filip K. Arnberg
Format: Article
Language:English
Published: Taylor & Francis Group 2019-12-01
Series:European Journal of Psychotraumatology
Subjects:
Online Access:http://dx.doi.org/10.1080/20008198.2019.1665617
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spelling doaj-7dabd3bd16384d17841e49cfe23656302021-01-04T17:13:51ZengTaylor & Francis GroupEuropean Journal of Psychotraumatology2000-80662019-12-0110110.1080/20008198.2019.16656171665617Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sampleKristina Bondjers0Philip Hyland1Neil P. Roberts2Jonathan I. Bisson3Mimmie Willebrand4Filip K. Arnberg5Uppsala UniversityMaynooth UniversityCardiff & Vale University Health BoardCardiff UniversityUppsala UniversityUppsala UniversityBackground: 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.http://dx.doi.org/10.1080/20008198.2019.1665617icd-11ptsdcomplex ptsdpsychometricsfactor analysis
collection DOAJ
language English
format Article
sources DOAJ
author Kristina Bondjers
Philip Hyland
Neil P. Roberts
Jonathan I. Bisson
Mimmie Willebrand
Filip K. Arnberg
spellingShingle Kristina Bondjers
Philip Hyland
Neil P. Roberts
Jonathan I. Bisson
Mimmie Willebrand
Filip K. Arnberg
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
icd-11
ptsd
complex ptsd
psychometrics
factor analysis
author_facet Kristina Bondjers
Philip Hyland
Neil P. Roberts
Jonathan I. Bisson
Mimmie Willebrand
Filip K. Arnberg
author_sort Kristina Bondjers
title Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample
title_short Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample
title_full Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample
title_fullStr Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample
title_full_unstemmed Validation of a clinician-administered diagnostic measure of ICD-11 PTSD and Complex PTSD: the International Trauma Interview in a Swedish sample
title_sort validation of a clinician-administered diagnostic measure of icd-11 ptsd and complex ptsd: the international trauma interview in a swedish sample
publisher Taylor & Francis Group
series European Journal of Psychotraumatology
issn 2000-8066
publishDate 2019-12-01
description 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.
topic icd-11
ptsd
complex ptsd
psychometrics
factor analysis
url http://dx.doi.org/10.1080/20008198.2019.1665617
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