M Cloitre1,2, M Shevlin3, C R Brewin4, J I Bisson5, N P Roberts6,7, A Maercker8, T Karatzias9,10, P Hyland11,12. 1. National Center for PTSD Dissemination and Training Division, VA Palo Alto Health Care System, Palo Alto, CA, USA. 2. Department of Psychiatry and Behavioural Sciences, Stanford University, Stanford, CA, USA. 3. School of Psychology, Ulster University, Derry, Northern Ireland. 4. Clinical Educational & Health Psychology, University College London, London, UK. 5. School of Medicine, Cardiff University, Cardiff, UK. 6. Psychology and Psychological Therapies Directorate, Cardiff & Vale University Health Board, Cardiff, UK. 7. Division of Psychological Medicine & Clinical Neurosciences, Cardiff University, Cardiff, UK. 8. Department of Psychopathology and Clinical Intervention, University of Zurich, Zurich, Switzerland. 9. Rivers Centre for Traumatic Stress, NHS Lothian, Edinburgh, UK. 10. School of Health & Social Care, Edinburgh Napier University, Edinburgh, UK. 11. School of Business, National College of Ireland, Dublin, Ireland. 12. Centre for Global Health, Trinity College Dublin, Dublin, Ireland.
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.
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.
Authors: Grace W K Ho; D Bressington; T Karatzias; W T Chien; S Inoue; P J Yang; A C Y Chan; P Hyland Journal: Soc Psychiatry Psychiatr Epidemiol Date: 2019-09-09 Impact factor: 4.328
Authors: Orla McBride; Sarah Butter; Jamie Murphy; Mark Shevlin; Todd K Hartman; Philip Hyland; Ryan McKay; Kate M Bennett; Jilly Gibson-Miller; Liat Levita; Liam Mason; Anton P Martinez; Thomas Va Stocks; Frédérique Vallières; Thanos Karatzias; Carmen Valiente; Carmelo Vazquez; Richard P Bentall Journal: Int J Methods Psychiatr Res Date: 2021-05-22 Impact factor: 4.182