<prompt> Diagnosis of irritable bowel syndrome is based on the following criteria EXCEPT-ROME-IIIRecurrent abdominal pain or discomfo at least 3 days per month in the last 3 monthImprovement with defecationOnset associated with a change in frequency, form and appearance of stoolNocturnal symptoms and hematochezia at least once in last 3 months  <response>: Davidson;s principles and practice of medicine 22nd edition. Rome III criteria. abdominal pain or discomfo at least 3 days in last 3 months associated with 2 or more of the following. improvement with defecation. change in frequency of stool. change in appearance of stool. 