Abstract
The etiology of the irritable bowel syndrome (IBS) is unexplained: biological, psychological and social factors must be considered. This study examined if differences in HPA-axis activity already exist in those who do not yet fulfill IBS criteria (i.e. “subthreshold IBS”). We also investigated whether there were differences between those who reported clinically relevant (i.e. distressing) IBS symptoms and those who did not. Thirty-six women were subdivided into three groups (IBS group, subthreshold IBS group, control group). Results showed differences in morning cortisol levels (U = 11.58; p < 0.05), with IBS patients showing a lower cortisol response compared to controls. Subthreshold IBS patients were comparable to controls regarding endocrine function. Diurnal cortisol levels did not differ between groups. Group comparisons between distressed subjects and non-distressed subjects regarding cortisol levels did not reach significance. The finding of endocrine abnormalities (at least in a sub-set of patients) is important since these might be associated with deficient pain processing in IBS.
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Charlotte Markert, Kerstin Suarez-Hitz, Ulrike Ehlert and Urs M. Nater declare that they have no conflict of interest.
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All procedures performed in studies involving human participants were in accordance with the ethical standards of the ethics committee of the Canton of Zurich and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Written informed consent was obtained from all individual participants included in the study.
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Markert, C., Suarez-Hitz, K., Ehlert, U. et al. Endocrine dysregulation in women with irritable bowel syndrome according to Rome II criteria. J Behav Med 39, 519–526 (2016). https://doi.org/10.1007/s10865-016-9718-x
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DOI: https://doi.org/10.1007/s10865-016-9718-x