Prevalence and Incidence of Irritable bowel syndrome


About prevalence and incidence statistics: The term 'prevalence' of Irritable bowel syndrome usually refers to the estimated population of people who are managing Irritable bowel syndrome at any given time. The term 'incidence' of Irritable bowel syndrome refers to the annual diagnosis rate, or the number of new cases of Irritable bowel syndrome diagnosed each year. Hence, these two statistics types can differ: a short-lived disease like flu can have high annual incidence but low prevalence, but a life-long disease like diabetes has a low annual incidence but high prevalence. For more information see about prevalence and incidence statistics.

Prevalance of Irritable bowel syndrome: 5 million in the USA 1987 (Digestive diseases in the United States: Epidemiology and Impact NIH Publication No. 94-1447, US Government Printing Office, 1994); 11 per 1000 (NHIS95)
Prevalance Rate: approx 1 in 54 or 1.84% or 5 million people in USA [about data]
Lifetime risk for Irritable bowel syndrome: about 30% of people
Prevalance of Irritable bowel syndrome: 5 million people (1987)1 ... IBS is a common problem, affecting up to one in five people.2

1. excerpt from Digestive Diseases Statistics: NIDDK
2. excerpt from Irritable Bowel Syndrome: NWHIC

Last revision: May 30, 2003

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