Does requiring trauma exposure affect rates of ICD-11 PTSD and complex PTSD? Implications for DSM-5 (2020)
Journal Article
Hyland, P., Karatzias, T., Shevlin, M., Mcelroy, E., Ben-Ezra, M., Cloitre, M., & Brewin, C. R. (2021). Does requiring trauma exposure affect rates of ICD-11 PTSD and complex PTSD? Implications for DSM-5. Psychological Trauma: Theory, Research, Practice, and Policy, 13(2), 133-141. https://doi.org/10.1037/tra0000908

Objective: There is little evidence that posttraumatic stress disorder (PTSD) is more likely to follow traumatic events defined by Criterion A than non-Criterion A stressors. Criterion A events might have greater predictive validity for ICD-11 PTSD w... Read More about Does requiring trauma exposure affect rates of ICD-11 PTSD and complex PTSD? Implications for DSM-5.

Lifetime interpersonal victimization profiles and mental health problems in a nationally representative panel of trauma-exposed adults from the United Kingdom (2020)
Journal Article
Charak, R., Vang, M. L., Shevlin, M., Ben-Ezra, M., Karatzias, T., & Hyland, P. (2020). Lifetime interpersonal victimization profiles and mental health problems in a nationally representative panel of trauma-exposed adults from the United Kingdom. Journal of Traumatic Stress, 33(5), 654-664. https://doi.org/10.1002/jts.22527

Exposure to traumatic events has been associated with negative psychological outcomes. There is, however, a dearth of research on revictimization (i.e., experiences of victimization during both childhood and adulthood). The current study examined dif... Read More about Lifetime interpersonal victimization profiles and mental health problems in a nationally representative panel of trauma-exposed adults from the United Kingdom.

A cross-country psychiatric screening of ICD-11 disorders specifically associated with stress in Kenya, Nigeria and Ghana (2020)
Journal Article
Ben-Ezra, M., Hyland, P., Karatzias, T., Maercker, A., Hamama-Raz, Y., Lavenda, O., Mahat-Shamir, M., & Shevlin, M. (2020). A cross-country psychiatric screening of ICD-11 disorders specifically associated with stress in Kenya, Nigeria and Ghana. European Journal of Psychotraumatology, 11(1), Article 1720972. https://doi.org/10.1080/20008198.2020.1720972

Background
The Global Forum for Health Research, with the support of the World Health Organization, highlighted the need to prioritize mental health research in Africa. The introduction of revised descriptions of Posttraumatic Stress Disorder (PTSD... Read More about A cross-country psychiatric screening of ICD-11 disorders specifically associated with stress in Kenya, Nigeria and Ghana.

Introduction to the Special Section on Complex Posttraumatic Stress Disorder (CPTSD): The Evolution of a Disorder (2019)
Journal Article
Karatzias, T., & Levendosky, A. A. (2019). Introduction to the Special Section on Complex Posttraumatic Stress Disorder (CPTSD): The Evolution of a Disorder. Journal of Traumatic Stress, 32(6), 817-821. https://doi.org/10.1002/jts.22476

The inclusion of complex posttraumatic stress disorder (CPTSD) in the 11th revision of the International Classification of Diseases is an important development in the field of psychotraumatology. Complex PTSD was developed as a response to a clinical... Read More about Introduction to the Special Section on Complex Posttraumatic Stress Disorder (CPTSD): The Evolution of a Disorder.

ICD‐11 Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the United States: A Population‐Based Study (2019)
Journal Article
Cloitre, M., Hyland, P., Bisson, J. I., Brewin, C. R., Roberts, N. P., Karatzias, T., & Shevlin, M. (2019). ICD‐11 Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the United States: A Population‐Based Study. Journal of Traumatic Stress, 32(6), 833-842. https://doi.org/10.1002/jts.22454

The primary aim of this study was to provide an assessment of the current prevalence rates of ICD-11 posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) among the adult population of the United States and to identify characteristics and cor... Read More about ICD‐11 Posttraumatic Stress Disorder and Complex Posttraumatic Stress Disorder in the United States: A Population‐Based Study.

Examining the Discriminant Validity of Complex Posttraumatic Stress Disorder and Borderline Personality Disorder Symptoms: Results From a United Kingdom Population Sample (2019)
Journal Article
Hyland, P., Karatzias, T., Shevlin, M., & Cloitre, M. (2019). Examining the Discriminant Validity of Complex Posttraumatic Stress Disorder and Borderline Personality Disorder Symptoms: Results From a United Kingdom Population Sample. Journal of Traumatic Stress, 32(6), 855-863. https://doi.org/10.1002/jts.22444

Complex Posttraumatic Stress Disorder (CPTSD) was added to the diagnostic nomenclature in the 11th version of the International Classification of Diseases (ICD-11). Although considerable evidence exists supporting the construct validity of CPTSD, the... Read More about Examining the Discriminant Validity of Complex Posttraumatic Stress Disorder and Borderline Personality Disorder Symptoms: Results From a United Kingdom Population Sample.

Treating Adults With Complex Posttraumatic Stress Disorder Using a Modular Approach to Treatment: Rationale, Evidence, and Directions for Future Research (2019)
Journal Article
Karatzias, T., & Cloitre, M. (2019). Treating Adults With Complex Posttraumatic Stress Disorder Using a Modular Approach to Treatment: Rationale, Evidence, and Directions for Future Research. Journal of Traumatic Stress, 32(6), 870-876. https://doi.org/10.1002/jts.22457

ICD-11 complex PTSD (CPTSD) is a new condition and therefore there are as yet no clinical trials evaluating interventions for its treatment. In this paper, we provide the rationale for a flexible multi-modular approach to the treatment of CPTSD, its... Read More about Treating Adults With Complex Posttraumatic Stress Disorder Using a Modular Approach to Treatment: Rationale, Evidence, and Directions for Future Research.

Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire (2019)
Journal Article
Shevlin, M., Hyland, P., Ben-Ezra, M., Karatzias, T., Cloitre, M., Vallières, F., Bachem, R., & Maercker, A. (2020). Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire. Acta Psychiatrica Scandinavica, 141(3), 265-274. https://doi.org/10.1111/acps.13126

Background: Adjustment disorder (AjD) is one of the most frequently used diagnoses in psychiatry but a diagnostic definition for AjD was only introduced in release of the ICD-11. This study sought to develop and validate a new measure operationalizin... Read More about Measuring ICD-11 Adjustment Disorder: The Development and Initial Validation of the International Adjustment Disorder Questionnaire.

Personally meaningful recovery in people with psychological trauma: Initial validity and reliability of the Individual Recovery Outcomes Counter (I.ROC) (2019)
Journal Article
Rudd, B., Karatzias, T., Bradley, A., Fyvie, C., & Hardie, S. (2020). Personally meaningful recovery in people with psychological trauma: Initial validity and reliability of the Individual Recovery Outcomes Counter (I.ROC). International Journal of Mental Health Nursing, 29(3), 387-398. https://doi.org/10.1111/inm.12671

I.ROC is a brief tool measuring personal recovery designed for collaborative use within support. This study aimed to investigate the psychometric properties of a self-report version of the I.ROC within a trauma population. A total of 107 adults atten... Read More about Personally meaningful recovery in people with psychological trauma: Initial validity and reliability of the Individual Recovery Outcomes Counter (I.ROC).

The relationship between ICD-11 PTSD, complex PTSD and dissociative experiences (2019)
Journal Article
Hyland, P., Shevlin, M., Fyvie, C., Cloitre, M., & Karatzias, T. (2020). The relationship between ICD-11 PTSD, complex PTSD and dissociative experiences. Journal of Trauma and Dissociation, 21(1), 62-72. https://doi.org/10.1080/15299732.2019.1675113

Debate exists in the trauma literature regarding the role of dissociation in traumatic stress disorders. With the release of the new ICD-11 diagnostic guideline for posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD), this issue warrants fu... Read More about The relationship between ICD-11 PTSD, complex PTSD and dissociative experiences.

The mediating role of early maladaptive schemas in the relationship between childhood traumatic events and complex posttraumatic stress disorder symptoms in older adults (>64 years) (2019)
Journal Article
Vasilopoulou, E., Karatzias, T., Hyland, P., Wallace, H., & Guzman, A. (2020). The mediating role of early maladaptive schemas in the relationship between childhood traumatic events and complex posttraumatic stress disorder symptoms in older adults (>64 years). Journal of Loss and Trauma, 25(2), 141-158. https://doi.org/10.1080/15325024.2019.1661598

The current study investigated the mediating role of Early Maladaptive Schemas (EMS) in the association between childhood trauma and Complex PTSD (CPTSD) symptom severity in a clinical sample of 42 older adults (>64 years). It was found that EMS tota... Read More about The mediating role of early maladaptive schemas in the relationship between childhood traumatic events and complex posttraumatic stress disorder symptoms in older adults (>64 years).

The relationship between interpersonal trauma and substance misuse in pregnancy – a narrative review of the literature (2019)
Journal Article
Waddell, N., & Karatzias, T. (2019). The relationship between interpersonal trauma and substance misuse in pregnancy – a narrative review of the literature. British Journal of Midwifery, 27(9), 578-588. https://doi.org/10.12968/bjom.2019.27.9.578

Background
There is a strong body of evidence supporting associations between interpersonal trauma (IPT) and substance use; however, this tends to focus on associations between childhood trauma and substance use in non-pregnant populations. Neonatal... Read More about The relationship between interpersonal trauma and substance misuse in pregnancy – a narrative review of the literature.

Multiple and interpersonal trauma are risk factors for both post‐traumatic stress disorder and borderline personality disorder: A systematic review on the traumatic backgrounds and clinical characteristics of comorbid post‐traumatic stress disorder/borderline personality disorder groups versus single‐disorder groups (2019)
Journal Article
Jowett, S., Karatzias, T., & Albert, I. (2020). Multiple and interpersonal trauma are risk factors for both post‐traumatic stress disorder and borderline personality disorder: A systematic review on the traumatic backgrounds and clinical characteristics of comorbid post‐traumatic stress disorder/borderline personality disorder groups versus single‐disorder groups. Psychology and Psychotherapy: Theory, Research and Practice, 93(3), 621-638. https://doi.org/10.1111/papt.12248

Background: Both BPD and PTSD are associated with exposure to traumatic events and are highly comorbid. No review to date has addressed the clinical presentations and traumatic backgrounds associated with these disorders although this work is essenti... Read More about Multiple and interpersonal trauma are risk factors for both post‐traumatic stress disorder and borderline personality disorder: A systematic review on the traumatic backgrounds and clinical characteristics of comorbid post‐traumatic stress disorder/borderline personality disorder groups versus single‐disorder groups.

Differentiating Symptom Profiles of ICD-11 PTSD, Complex PTSD and Borderline Personality Disorder: A Latent Class Analysis in a Multiply Traumatised Sample (2019)
Journal Article
Jowett, S., Karatzias, T., Shevlin, M., & Albert, I. (2020). Differentiating Symptom Profiles of ICD-11 PTSD, Complex PTSD and Borderline Personality Disorder: A Latent Class Analysis in a Multiply Traumatised Sample. Personality Disorders: Theory, Research, and Treatment, 11(1), 36-45. https://doi.org/10.1037/per0000346

Background: Complex PTSD (CPTSD) has been included as a diagnostic category in the ICD-11 consisting of six symptom clusters; the three PTSD criteria of Re-experiencing, Avoidance, and Hypervigilance, in addition to three Disturbances of Self-Organis... Read More about Differentiating Symptom Profiles of ICD-11 PTSD, Complex PTSD and Borderline Personality Disorder: A Latent Class Analysis in a Multiply Traumatised Sample.

The distribution of Psychosis, ICD-11 PTSD and Complex PTSD symptoms among a trauma-exposed UK general population sample (2019)
Journal Article
Frost, R., Louison Vang, M., Karatzias, T., Hyland, P., & Shevlin, M. (2019). The distribution of Psychosis, ICD-11 PTSD and Complex PTSD symptoms among a trauma-exposed UK general population sample. Psychosis, 11(3), 187-198. https://doi.org/10.1080/17522439.2019.1626472

Background: Co-occurrence of psychosis and posttraumatic stress disorder (PTSD) symptoms has been demonstrated, but the ICD-11 marks a significant divergence in the formulation of PTSD with a focus on the core symptoms and the addition of Complex PTS... Read More about The distribution of Psychosis, ICD-11 PTSD and Complex PTSD symptoms among a trauma-exposed UK general population sample.

Translation and validation of the Chinese ICD-11 International Trauma Questionnaire (ITQ) for the Assessment of Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) (2019)
Journal Article
Ho, G. W. . K., Karatzias, T., Cloitre, M., Chan, A. C. Y., Bressington, D., Chien, W. T., Hyland, P., & Shevlin, M. (2019). Translation and validation of the Chinese ICD-11 International Trauma Questionnaire (ITQ) for the Assessment of Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). European Journal of Psychotraumatology, 10(1), https://doi.org/10.1080/20008198.2019.1608718

Two stress related disorders have been proposed for inclusion in the revised ICD11: Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD). The International Trauma Questionnaire (ITQ) is a bespoke measure of PTSD and CPTSD, and has been widel... Read More about Translation and validation of the Chinese ICD-11 International Trauma Questionnaire (ITQ) for the Assessment of Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD).

Psychological interventions for ICD-11 Complex PTSD symptoms: Systematic review and meta-analysis (2019)
Journal Article
Karatzias, T., Murphy, P., Cloitre, M., Bisson, J., Roberts, N., Shevlin, M., Hyland, P., Maercker, A., Ben-Ezra, M., Coventry, P., Mason-Roberts, S., Bradley, A., & Hutton, P. (2019). Psychological interventions for ICD-11 Complex PTSD symptoms: Systematic review and meta-analysis. Psychological Medicine, 49(11), 1761-1775. https://doi.org/10.1017/S0033291719000436

Background: The 11th revision to the WHO International Classification of Diseases (ICD-11) identified Complex Posttraumatic Stress Disorder (CPTSD) as a new condition. There is a pressing need to identify effective CPTSD interventions. Methods: We co... Read More about Psychological interventions for ICD-11 Complex PTSD symptoms: Systematic review and meta-analysis.

A mixed‐methods, randomized controlled feasibility trial of Eye Movement Desensitization and Reprocessing (EMDR) plus Standard Care (SC) versus SC alone for DSM‐5 Posttraumatic Stress Disorder (PTSD) in adults with intellectual disabilities (2019)
Journal Article
Karatzias, T., Brown, M., Taggart, L., Truesdale, M., Sirisena, C., Walley, R., Mason-Roberts, S., Bradley, A., & Paterson, D. (2019). A mixed‐methods, randomized controlled feasibility trial of Eye Movement Desensitization and Reprocessing (EMDR) plus Standard Care (SC) versus SC alone for DSM‐5 Posttraumatic Stress Disorder (PTSD) in adults with intellectual disabilities. Journal of Applied Research in Intellectual Disabilities, 32(4), 806-818. https://doi.org/10.1111/jar.12570

Objective: To report the results of the first randomised feasibility trial of Eye Movement Desensitisation and Reprocessing (EMDR) plus Standard Care (SC) vs. SC alone for DSM-5 Posttraumatic Stress Disorder (PTSD) in adults with intellectual disabil... Read More about A mixed‐methods, randomized controlled feasibility trial of Eye Movement Desensitization and Reprocessing (EMDR) plus Standard Care (SC) versus SC alone for DSM‐5 Posttraumatic Stress Disorder (PTSD) in adults with intellectual disabilities.

A Cross‐Cultural Comparison of ICD‐11 Complex Posttraumatic Stress Disorder Symptom Networks in Austria, the United Kingdom, and Lithuania (2019)
Journal Article
Knefel, M., Lueger-Schuster, B., Bisson, J., Karatzias, T., Kazlauskas, E., & Roberts, N. P. (2020). A Cross‐Cultural Comparison of ICD‐11 Complex Posttraumatic Stress Disorder Symptom Networks in Austria, the United Kingdom, and Lithuania. Journal of Traumatic Stress, 33(1), 41-51. https://doi.org/10.1002/jts.22361

The 11th revision of the World Health Organization's International Classification of Diseases (ICD-11) may include a new disorder, Complex Posttraumatic Stress Disorder (CPTSD). The network approach to psychopathology enables investigation of the str... Read More about A Cross‐Cultural Comparison of ICD‐11 Complex Posttraumatic Stress Disorder Symptom Networks in Austria, the United Kingdom, and Lithuania.

The replicability of ICD-11 complex post-traumatic stress disorder symptom networks in adults (2019)
Journal Article
Knefel, M., Karatzias, T., Ben-Ezra, M., Cloitre, M., Lueger-Schuster, B., & Maercker, A. (2019). The replicability of ICD-11 complex post-traumatic stress disorder symptom networks in adults. British Journal of Psychiatry, 214(6), 361-368. https://doi.org/10.1192/bjp.2018.286

Background: The 11th revision of the World Health Organization's International Classification of Diseases (ICD-11) includes a new disorder, Complex Posttraumatic Stress Disorder (CPTSD). A network approach to CPTSD will enable investigation of the st... Read More about The replicability of ICD-11 complex post-traumatic stress disorder symptom networks in adults.