Association between disturbance of self-organization and irritable bowel syndrome in Japanese population using the international trauma questionnaire

Disturbance of self-organization (DSO) is defined by affective dysregulation, negative self-concept, and disturbances in relationships. Along with post-traumatic stress disorder (PTSD), DSO is a part of complex post-traumatic stress disorder (CPTSD), which often results from childhood trauma and has life-long consequences. We investigated the association between CPTSD, PTSD, DSO, childhood adversity, and irritable bowel syndrome (IBS). Individuals with IBS exhibited markedly higher prevalences of DSO, CPTSD, and PTSD symptoms and higher trauma scores compared with healthy individuals. The odds of having IBS were 3.718 and 1.924 times greater for those with DSO symptoms (p < .001) and CPTSD symptoms (p = .005), respectively. IBS severity was highest in the DSO group, followed by the CPTSD, PTSD, and non-DSO/CPTSD/PTSD groups. DSO symptoms mediate the impact of childhood adversity on IBS symptoms, explaining half of this effect, whereas PTSD symptoms do not. These findings suggest a significant role of DSO in the development of IBS.