The Danish Center for Psychotraumatology has researched the relationship between PTSD and the degree of somatisation in a number of contexts.
Our research shows, among other things, that post-traumatic stress symptoms are mediating factors in the explanation of persistent symptoms after accidents and contribute to an understanding of chronic pain and somatisation.
Similarly, we have found that negative affect and feelings of incompetence resulting from traumatic experiences are strong predictors of somatisation, while other psychological variables such as dissociation, depression and anxiety are not associated with the degree of somatisation.
Elklit, A. & Christiansen, D. M. (2009). Predictive factors for somatisation in a trauma sample. Clinical Practice and Epidemiology in Mental Health, 5 (1), 1-8. Doi:10.1186./1745-0179-5-1.
Andersen, T. E., Elklit, A., & Brink O. (2013). PTSD Symptoms Mediate the Effect of Attachment on Pain and Somatisation after Whiplash injury. Clinical Practice & Epidemiology in Mental Health, 9, 75-83. Doi: 10.2174/1745017901309010075