TABLE 1.

Rome IV diagnostic criteria for IBS‐D and FDr

Rome IV IBS‐D diagnostic criteria	Rome IV FDr diagnostic criteria
1. Recurrent abdominal pain, on average, at least 1 day per week in the last 3 months and associated with two or more or the following:	1. Loose or watery stools, without predominant abdominal pain or bothersome bloating, occurring in >25% of stools.
a. Related to defecation	2. Criteria fulfilled for the last 3 months with symptom onset at least 6 months prior to diagnosis.
b. Associated with a change in frequency of stool	3. Patients meeting criteria for IBS‐D should be excluded
c. Associated with a change in stool form, with the IBS‐D subtype identified with: > 25% Bristol stool types 6 or 7 and <25% Bristol stool types 1 or 2	‐
2. Criteria fulfilled for the last 3 months with symptom onset at least 6 months prior to diagnosis	‐

Abbreviations: FDr, functional diarrhoea; IBS, Irritable bowel syndrome.