P Hyland1,2, M Shevlin3, C R Brewin4, M Cloitre5,6, A J Downes7, S Jumbe8, T Karatzias9,10, J I Bisson11, N P Roberts12. 1. National College of Ireland, Dublin, Ireland. 2. Centre for Global Health, Trinity College Dublin, Dublin, Ireland. 3. School of Psychology, Ulster University, Derry, UK. 4. Clinical Educational & Health Psychology, University College London, London, UK. 5. School of Medicine, New York University, New York, NY, USA. 6. National Center for PTSD, Veterans Affairs Palo Alto Health Care System, Palo Alto, CA, USA. 7. St Mark's Dee View Surgery, Betsi Cadwaldr Health Board, Connah's Quay, UK. 8. Centre for Primary Care and Public Health, Queen Mary University of London, Research Design Service London, London, UK. 9. School of Health & Social Care, Edinburgh Napier University, Edinburgh, UK. 10. Rivers Centre for Traumatic Stress, NHS Lothian, Edinburgh, UK. 11. School of Medicine, Cardiff University, Cardiff, UK. 12. Cardiff & Vale University Health Board, Cardiff, UK.
Abstract
OBJECTIVE: The 11th version of the International Classification of Diseases (ICD-11) has proposed two related trauma diagnoses: Post-traumatic stress disorder (PTSD) and Complex PTSD (CPTSD). Using a newly developed, disorder-specific measure of PTSD and CPTSD called the International Trauma Questionnaire (ITQ) the current study will (i) assess the factorial validity of ICD-11 PTSD and CPTSD; (ii) provide the first test of the discriminant validity of these constructs; and (iii) provide the first comparison of ICD-11, and Diagnostic and Statistical Manual, Fifth Edition (DSM-5), PTSD diagnostic rates using disorder-specific measures. METHOD: ICD-11 and DSM-5 PTSD-specific measures were completed by a British clinical sample of trauma-exposed patients (N = 171). The structure and validity of ICD-11 PTSD and CPTSD were assessed by means of factor analysis and assessing relationships with criterion variables. RESULTS: Diagnostic rates under ICD-11 were significantly lower than those under DSM-5. A two-factor second-order model reflecting the distinction between PTSD and CPTSD best represented the data from the ITQ; and the PTSD and CPTSD factors differentially predicted multiple psychological variables. CONCLUSION: The factorial and discriminant validity of ICD-11 PTSD and CPTSD was supported, and ICD-11 produces fewer diagnostic cases than DSM-5.
OBJECTIVE: The 11th version of the International Classification of Diseases (ICD-11) has proposed two related trauma diagnoses: Post-traumatic stress disorder (PTSD) and Complex PTSD (CPTSD). Using a newly developed, disorder-specific measure of PTSD and CPTSD called the International Trauma Questionnaire (ITQ) the current study will (i) assess the factorial validity of ICD-11 PTSD and CPTSD; (ii) provide the first test of the discriminant validity of these constructs; and (iii) provide the first comparison of ICD-11, and Diagnostic and Statistical Manual, Fifth Edition (DSM-5), PTSD diagnostic rates using disorder-specific measures. METHOD: ICD-11 and DSM-5 PTSD-specific measures were completed by a British clinical sample of trauma-exposed patients (N = 171). The structure and validity of ICD-11 PTSD and CPTSD were assessed by means of factor analysis and assessing relationships with criterion variables. RESULTS: Diagnostic rates under ICD-11 were significantly lower than those under DSM-5. A two-factor second-order model reflecting the distinction between PTSD and CPTSD best represented the data from the ITQ; and the PTSD and CPTSD factors differentially predicted multiple psychological variables. CONCLUSION: The factorial and discriminant validity of ICD-11 PTSD and CPTSD was supported, and ICD-11 produces fewer diagnostic cases than DSM-5.
Authors: Maj Hansen; Philip Hyland; Karen-Inge Karstoft; Henrik B Vaegter; Rikke H Bramsen; Anni B S Nielsen; Cherie Armour; Søren B Andersen; Mette Terp Høybye; Simone Kongshøj Larsen; Tonny E Andersen Journal: Eur J Psychotraumatol Date: 2017-11-13
Authors: Mark Shevlin; Philip Hyland; Neil P Roberts; Jonathan I Bisson; Chris R Brewin; Marylene Cloitre Journal: Eur J Psychotraumatol Date: 2018-01-17