Irritable bowel syndrome diagnosis
BOS, IBS-C, recent bowel movements, abdominal pain, diarrhea, IBS, IBS-D, IBS-U, pain, constipation, IBS-M
We used the Rome IV criteria, which specify that abdominal pain is present for more than 6 months once a week in the last 12 and at least two of the following three characteristics are noted: (a) pain related to defecation associated with changes in the (b) frequency of defecation and/or in the (c) appearance of stool [Using a pictorial representation of the Bristol Scale, we recorded the most frequent type of stool consistency subjectively perceived by the patient (Bristol Subjective Scale, BSS) and the percentage of time in which the patient objectively observed their different consistencies (Bristol Objective Scale, BOS). To determine the BSS score, we asked patients to select which of the drawings they perceived as the most frequent. After answering this question, we evaluated the BOS by asking the patient to provide the maximum number of recent bowel movements (they mentioned between 4 and 12) and characterize the feces according to the Bristol scale. Finally, we assigned a percentage to each type of evacuation. The following IBS subtypes were determined using the BOS as suggested by the Rome IV criteria: constipation (IBS-C), diarrhea (IBS-D), mixed (IBS-M), or undetermined (IBS-U) [