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Prevalence and Validity of ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD: A Population-Based Survey of Hong Kong Adults (2024)
Journal Article
Ho, G. W., Chan, K. L., Karatzias, T., Hyland, P., Fung, H. W., & Shevlin, M. (2024). Prevalence and Validity of ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD: A Population-Based Survey of Hong Kong Adults. Asian Journal of Psychiatry, 96, Article 104045. https://doi.org/10.1016/j.ajp.2024.104045

The present study aimed to report the prevalence of ICD-11 posttraumatic stress disorder (PTSD) and complex PTSD (CPTSD) in the general adult Hong Kong population, and examine the validity of the Chinese International Trauma Questionnaire (ITQ). This... Read More about Prevalence and Validity of ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD: A Population-Based Survey of Hong Kong Adults.

Childhood adversity and mental health admission patterns prior to young person suicide (CHASE): a case-control 36 year linked hospital data study, Scotland UK 1981-2017 (2024)
Journal Article
Dougall, N., Savinc, J., Maxwell, M., Karatzias, T., O’Connor, R. C., Williams, B., …Murray, J. (in press). Childhood adversity and mental health admission patterns prior to young person suicide (CHASE): a case-control 36 year linked hospital data study, Scotland UK 1981-2017. BJPsych Open,

Background Childhood adversity (CA) is associated with increased later mental health (MH) problems and suicidal behaviour. Opportunities for earlier healthcare identification and intervention are needed. Aim To determine associations between hos... Read More about Childhood adversity and mental health admission patterns prior to young person suicide (CHASE): a case-control 36 year linked hospital data study, Scotland UK 1981-2017.

Physical, mental, and behavioral health after adverse and benevolent childhood experiences: a comparison of two adversity conceptualizations (2024)
Journal Article
Ho, G. W., Ling Chan, K., Ho Wong, K., Fong Leung, S., & Karatzias, T. (in press). Physical, mental, and behavioral health after adverse and benevolent childhood experiences: a comparison of two adversity conceptualizations. Psychological Trauma: Theory, Research, Practice, and Policy,

Objective: Adverse and benevolent childhood experiences (ACEs, BCEs) impact health across the lifespan. No known study has investigated these associations across different health domains using a representative adult sample. This study examined the as... Read More about Physical, mental, and behavioral health after adverse and benevolent childhood experiences: a comparison of two adversity conceptualizations.

Mental health in Ukraine in 2023 (2024)
Journal Article
Martsenkovskyi, D., Shevlin, M., Ben-Ezra, M., Bondjers, K., Fox, R., Karatzias, T., …Hyland, P. (2024). Mental health in Ukraine in 2023. European Psychiatry, 67(1), Article e27. https://doi.org/10.1192/j.eurpsy.2024.12

Background Very little is known about the mental health of the adult population of Ukraine following Russia’s full-scale invasion in February 2022. In this study, we estimated the prevalence of seven mental health disorders, the proportion of adults... Read More about Mental health in Ukraine in 2023.

Enhanced Skills Training in Affective and Interpersonal Regulation (ESTAIR) vs. Treatment as Usual (TAU) for ICD-11 Complex PTSD: A pilot randomised controlled trial (The RESTORE trial) (2024)
Journal Article
Karatzias, T., Shevlin, M., Cloitre, M., Busuttil, W., Graham, K., Hendrikx, L., …Murphy, D. (in press). Enhanced Skills Training in Affective and Interpersonal Regulation (ESTAIR) vs. Treatment as Usual (TAU) for ICD-11 Complex PTSD: A pilot randomised controlled trial (The RESTORE trial). Psychotherapy and Psychosomatics,

Introduction Complex PTSD (CPTSD) is a relatively new condition in ICD-11. This pilot randomised controlled trial aimed to compare a four-module intervention developed to target all symptoms of ICD-11 CPTSD, namely Enhanced Skills in Affective and... Read More about Enhanced Skills Training in Affective and Interpersonal Regulation (ESTAIR) vs. Treatment as Usual (TAU) for ICD-11 Complex PTSD: A pilot randomised controlled trial (The RESTORE trial).

Prevalence and correlates of ICD-11 prolonged grief disorder among adults living in Ukraine during the war with Russia (2024)
Journal Article
Redican, E., Hyland, P., Shevlin, M., Martsenkovskyi, D., Karatzias, T., & Ben-Ezra, M. (2024). Prevalence and correlates of ICD-11 prolonged grief disorder among adults living in Ukraine during the war with Russia. Acta Psychiatrica Scandinavica, 149(5), 425-435. https://doi.org/10.1111/acps.13678

Background: Although high rates of bereavement are evident in war-affected populations, no study has investigated the prevalence and correlates of probable ICD-11 Prolonged Grief Disorder (PGD) under these circumstances. Methods: Participants we... Read More about Prevalence and correlates of ICD-11 prolonged grief disorder among adults living in Ukraine during the war with Russia.

Correlates of Posttraumatic Stress Disorder in the Aftermath of the February 2023 Earthquake in Turkey (2024)
Journal Article
Han Alpay, E., Redican, E., Hyland, P., Karatzias, T., & Shevlin, M. (in press). Correlates of Posttraumatic Stress Disorder in the Aftermath of the February 2023 Earthquake in Turkey. Journal of Loss and Trauma, https://doi.org/10.1080/15325024.2024.2314306

On February 6, 2023, an earthquake registering 7.8 on the Richter scale struck southeast Turkey, and this was followed by a second earthquake of magnitude 7.5. The earthquake resulted in widespread loss, devastation, and destruction, and is anticipat... Read More about Correlates of Posttraumatic Stress Disorder in the Aftermath of the February 2023 Earthquake in Turkey.

ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) in mental health support-seeking former-serving Australian Defence Force Veterans (2024)
Journal Article
Bressington, D., Hyland, P., Steele, H., Byrne, M., Mitchell, D., Keane, C., …Karatzias, T. (in press). ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) in mental health support-seeking former-serving Australian Defence Force Veterans. Australian and New Zealand Journal of Psychiatry, https://doi.org/10.1177/00048674241230197

Background ICD-11 complex posttraumatic stress disorder (CPTSD) is a more severe condition than PTSD, and recent studies indicate it is more prevalent among military samples. In this study, we tested the psychometric properties of the International... Read More about ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) in mental health support-seeking former-serving Australian Defence Force Veterans.

Cumulative risk exposure is associated with increased risk for PTSD but not depression or anxiety. Results from a UK clinical sample of children and adolescents (2024)
Journal Article
Turgoose, D., Wilkinson, S., Shevlin, M., & Karatzias, T. (in press). Cumulative risk exposure is associated with increased risk for PTSD but not depression or anxiety. Results from a UK clinical sample of children and adolescents. Developmental Child Welfare, https://doi.org/10.1177/25161032241230980

Background Childhood adversity can include traumatic experiences and exposure to other risk factors; consistently predicting poorer psychosocial outcomes in adulthood. Relatively little research has investigated the impact of cumulative risk exposur... Read More about Cumulative risk exposure is associated with increased risk for PTSD but not depression or anxiety. Results from a UK clinical sample of children and adolescents.

Severe dissociative experiences beyond detachment in a large clinical sample of inpatients with PTSD: Diagnostic and treatment implications (2024)
Journal Article
Kratzer, L., Tschöke, S., Schröder, J., Shevlin, M., Hyland, P., Eckenberger, C., …Karatzias, T. (in press). Severe dissociative experiences beyond detachment in a large clinical sample of inpatients with PTSD: Diagnostic and treatment implications. Psychopathology,

Introduction: The fifth edition of the Diagnostic and Statistical Manual of Mental Disorders (DSM-5; American Psychiatric Association, 2013) contains a dissociative subtype of post-traumatic stress disorder (PTSD) characterized by depersonalization a... Read More about Severe dissociative experiences beyond detachment in a large clinical sample of inpatients with PTSD: Diagnostic and treatment implications.

EMDR v. other psychological therapies for PTSD: a systematic review and individual participant data meta-analysis (2024)
Journal Article
Wright, S. L., Karyotaki, E., Cuijpers, P., Bisson, J., Papola, D., Witteveen, A., …Sijbrandij, M. (in press). EMDR v. other psychological therapies for PTSD: a systematic review and individual participant data meta-analysis. Psychological Medicine, https://doi.org/10.1017/s0033291723003446

Background This systematic review and individual participant data meta-analysis (IPDMA) examined the overall effectiveness of eye movement desensitization and reprocessing (EMDR) in reducing posttraumatic stress disorder (PTSD) symptoms, achieving r... Read More about EMDR v. other psychological therapies for PTSD: a systematic review and individual participant data meta-analysis.

The role of resilience in the relationship between intimate partner violence severity and ICD-11 CPTSD severity (2023)
Journal Article
Fernández-Fillol, C., Hidalgo-Ruzzante, N., Perez-Garcia, M., Hyland, P., Shevlin, M., & Karatzias, T. (2024). The role of resilience in the relationship between intimate partner violence severity and ICD-11 CPTSD severity. European Journal of Psychotraumatology, 15(1), Article 2285671. https://doi.org/10.1080/20008066.2023.2285671

Background: Resilience is a modulating factor in the development of PTSD and CPTSD after exposure to traumatic events. However, the relationship between resilience and ICD-11 CPTSD is not adequately understood in survivors of intimate partner violenc... Read More about The role of resilience in the relationship between intimate partner violence severity and ICD-11 CPTSD severity.

The critical role of affect regulation accounting for increased general distress, risk to self, and lower quality of life in females with EUPD and CPTSD, compared to EUPD alone (2023)
Journal Article
Morris, D., Webb, E., Umpunjun, P., Fox, E., Dickens, A., Leson, A., …Karatzias, T. (2024). The critical role of affect regulation accounting for increased general distress, risk to self, and lower quality of life in females with EUPD and CPTSD, compared to EUPD alone. European Journal of Trauma & Dissociation, 8(1), Article 100374

Background: Complex Post-Traumatic Stress Disorder (CPTSD) and Emotionally Unstable Personality Disorder (EUPD) have shared aetiology and symptomatology, and are associated with multiple comorbidities and poor clinical outcomes. Evidence from studies... Read More about The critical role of affect regulation accounting for increased general distress, risk to self, and lower quality of life in females with EUPD and CPTSD, compared to EUPD alone.

Responding to concerns related to the measurement of ICD-11 complex posttraumatic stress disorder using the International Trauma Questionnaire (2023)
Journal Article
Hyland, P., Brewin, C. R., Cloitre, M., Karatzias, T., & Shevlin, M. (2024). Responding to concerns related to the measurement of ICD-11 complex posttraumatic stress disorder using the International Trauma Questionnaire. Child Abuse and Neglect, 147, Article 106563. https://doi.org/10.1016/j.chiabu.2023.106563

Background: A recent study in this journal by Frewen et al. (2023) provided a critical analysis of the most widely used measure of ICD-11 Complex Posttraumatic Stress Disorder (CPTSD), the International Trauma Questionnaire (ITQ). The article was a t... Read More about Responding to concerns related to the measurement of ICD-11 complex posttraumatic stress disorder using the International Trauma Questionnaire.

The International Grief Questionnaire (IGQ): A new measure of ICD‐11 prolonged grief disorder (2023)
Journal Article
Hyland, P., Redican, E., Karatzias, T., & Shevlin, M. (2024). The International Grief Questionnaire (IGQ): A new measure of ICD‐11 prolonged grief disorder. Journal of Traumatic Stress, 37(1), 141-153. https://doi.org/10.1002/jts.22986

Prolonged grief disorder (PGD) is included in the 11th version of the International Statistical Classification of Diseases and Related Health Problems (ICD‐11). This study sought to test the validity and reliability of a new brief measure to screen f... Read More about The International Grief Questionnaire (IGQ): A new measure of ICD‐11 prolonged grief disorder.

Initial Validation of the International Trauma Questionnaire (ITQ) in a sample of Chilean Adults European Journal of Psychotraumatology (2023)
Journal Article
Fresno, A., Ramos Alvarado, N., Núñez, D., Ulloa, J. L., Arriagada, J., Cloitre, M., …Karatzias, T. (2023). Initial Validation of the International Trauma Questionnaire (ITQ) in a sample of Chilean Adults European Journal of Psychotraumatology. European Journal of Psychotraumatology, 14(2), Article 2263313. https://doi.org/10.1080/20008066.2023.2263313

Background: ICD-11 Posttraumatic Stress Disorder (PTSD) and Complex PTSD (CPTSD) are stress-related disorders. The International Trauma Questionnaire (ITQ) is a widely used instrument to assess PTSD and CPTSD. To date, there is no evidence of the psy... Read More about Initial Validation of the International Trauma Questionnaire (ITQ) in a sample of Chilean Adults European Journal of Psychotraumatology.

The association between daily life changes and anxiety among Ukrainians following the Russian invasion (2023)
Journal Article
Yafit, L., Rahel, B., Philip, H., Frédérique, V., Mark, S., Thanos, K., …Dmytro, M. (2023). The association between daily life changes and anxiety among Ukrainians following the Russian invasion. Psychiatry Research, 329, Article 115530. https://doi.org/10.1016/j.psychres.2023.115530

This study sought to explore the association between changes in daily life and war-related anxiety. In this study, we analyzed self-reported data from 2,004 Ukrainian adults, obtained through an opportunistic survey in the Ukraine. Our assessment foc... Read More about The association between daily life changes and anxiety among Ukrainians following the Russian invasion.

Assessing the validity and reliability of the International Anxiety Questionnaire and the International Depression Questionnaire in two bereaved national samples (2023)
Journal Article
Hyland, P., Redican, E., Karatzias, T., & Shevlin, M. (2024). Assessing the validity and reliability of the International Anxiety Questionnaire and the International Depression Questionnaire in two bereaved national samples. Clinical Psychology and Psychotherapy, 31(1), Article e2917. https://doi.org/10.1002/cpp.2917

The International Anxiety Questionnaire (IAQ) and International Depression Questionnaire (IDQ) are self-report measures of ICD-11 Generalized Anxiety Disorder (ICD-11 GAD) and ICD-11 Single Episode Depressive Disorder (ICD-11 DD). This study tested t... Read More about Assessing the validity and reliability of the International Anxiety Questionnaire and the International Depression Questionnaire in two bereaved national samples.

Parent-reported posttraumatic stress reactions in children and adolescents: Findings from The Mental Health of Parents and Children in Ukraine Study (2023)
Journal Article
Martsenkovskyi, D., Karatzias, T., Hyland, P., Shevlin, M., Ben-Ezra, M., McElroy, E., …Martsenkovsky, I. (in press). Parent-reported posttraumatic stress reactions in children and adolescents: Findings from The Mental Health of Parents and Children in Ukraine Study. Psychological Trauma: Theory, Research, Practice, and Policy, https://doi.org/10.1037/tra0001583

Background: Despite the long-standing ongoing war in Ukraine, information regarding war-related negative mental health outcomes in children is limited. A nationwide sample of parents in Ukraine was surveyed to assess posttraumatic stress disorder (PT... Read More about Parent-reported posttraumatic stress reactions in children and adolescents: Findings from The Mental Health of Parents and Children in Ukraine Study.