Objective. To delineate the psychological profile of individuals with irritable bowel syndrome (IBS).

Method. A triple questionnaire of 614 items (including psychological and medical ones) was given to 10192 respondents and the results were analyzed by means of Cronbach alpha and Chi square test, together with an ad-hoc designed method that implied ranking and outliers detecting.

Results and conclusions. Anxiety and depression are general psychological tendencies unspecifcally linked with IBS. Among the features with a relatively more specific correlation with IBS, tension has the strongest association, followed by the inclination to endure unacceptable situations, preoccupation for health, and susceptibility, and then by fear of failure and sense of demanding profession.

IBS individuals readily accept a subordinate position, which may be connected to their history of tyrannical parents, and also to their preoccupation for authority factors. The sense of being treated unfairly by the authority persons during the school years nuances this last feature. Some features that bring some nuances to this psychological portrait are: contemplative nature and analyzing tendency, preoccupation with health issues, a reserved, unsociable, and precautious nature, clinging to known circumstances.

Abbreviations: ChiSq = chi-square; OdRa = odds ratio; OdRaCL = OdRa confidence limits; ErrProb = probability of error; SS = statistically significant; CrA = Cronbach alpha; a / m = the calculations were done by taking into account the average/ maximal score; P / M = psychological / medical category; PaMm / PmMa / PmMm / PaMa = the calculations were done by taking into account the average score for the PsyCt and the maximal score for the MedCt / the maximal score for PsyCt and the average score for the MedCt / and the maximal score for both / and the average score for both; FD = functional dyspepsia; IBS = irritable bowel syndrome; IBSCt = IBS category; MedCt = medical category; PsyCt / PsyIt = psychological category / item.