Abdominal discomfort or pain, for at least 12 weeks (which need not be consecutive) in the preceding 12 months, with two of the following features:
	Relief with defecation
	Onset associated with a change in stool frequency
	Onset associated with a change in form or appearance of stool
These additional symptoms cumulatively support the diagnosis of IBS:
	Abnormal stool frequency (more than three times per day or less than three times per week)
	Abnormal stool form (loose and watery or lumpy and hard)
	Abnormal stool passage (urgency, frequency, feeling of incomplete evacuation)
Passage of mucus (white material)
Bloating or sensation of abdominal distention