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Title: High prevalence of somatisation in ICD-11 complex PTSD : a cross sectional cohort study
Authors: Astill, Wright, L
Roberts, NP
Lewis, C
Simon, N
Hyland, P
Ho, GWK 
McElroy, E
Bisson, JI
Issue Date: Sep-2021
Source: Journal of psychosomatic research, Sept. 2021, v. 148, 110574
Abstract: Background: While research demonstrates that somatisation is highly correlated with post-traumatic stress disorder (PTSD), the relationship between International Classification of Diseases 11th edition (ICD-11) PTSD, complex PTSD (CPTSD) and somatisation has not previously been determined.
Objective: To determine the relationship between frequency and severity of somatisation and ICD-11 PTSD/CPTSD.
Method: This cross-sectional study included 222 individuals recruited to the National Centre for Mental Health (NCMH) PTSD cohort. We assessed rates of Patient Health Questionnaire 15 (PHQ-15) somatisation stratified by ICD-11 PTSD/CPTSD status. Path analysis was used to explore the relationship between PTSD/CPTSD and somatisation, including number of traumatic events, age, and gender as controls.
Results: 70% (58/83) of individuals with CPTSD had high PHQ-15 somatisation symptom severity compared with 48% (12/25) of those with PTSD (chi-square: 95.1, p value <0.001). Path analysis demonstrated that core PTSD symptoms and not disturbances in self organisation (DSO) symptoms were associated with somatisation (unstandardised coefficients: 0.616 (p-value 0.017) and − 0.012 (p-value 0.962) respectively.
Conclusions: Individuals with CPTSD have higher somatisation than those with PTSD. The core features of PTSD, not the DSO, characteristic of CPTSD, were associated with somatisation.
Keywords: CPTSD
PTSD
Somatisation
Publisher: Elsevier
Journal: Journal of psychosomatic research 
ISSN: 0022-3999
EISSN: 1879-1360
DOI: 10.1016/j.jpsychores.2021.110574
Rights: © 2021 The Author(s). Published by Elsevier Inc. This is an open access article under the CC BY license (http://creativecommons.org/licenses/by/4.0/).
The following publication Wright, L. A., Roberts, N. P., Lewis, C., Simon, N., Hyland, P., Ho, G. W., ... & Bisson, J. I. (2021). High prevalence of somatisation in ICD-11 complex PTSD: A cross sectional cohort study. Journal of Psychosomatic Research, 148, 110574 is available at https://doi.org/10.1016/j.jpsychores.2021.110574
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