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The epidemiology of irritable bowel syndrome

Canavan, Caroline; West, Joe; Card, Timothy R.

The epidemiology of irritable bowel syndrome Thumbnail


Caroline Canavan

Professor of Epidemiology

Timothy R. Card


Irritable bowel syndrome (IBS) is a functional condition of the bowel that is diagnosed using clinical criteria. This paper discusses the nature of the diagnostic process for IBS and how this impacts epidemiological measurements. Depending on the diagnostic criteria employed, IBS affects around 11% of the population globally. Around 30% of people who experience the symptoms of IBS will consult physicians for their IBS symptoms. These people do not have significantly different abdominal symptoms to those who do not consult, but they do have greater levels of anxiety and lower quality of life. Internationally, there is a female predominance in the prevalence of IBS. There is 25% less IBS diagnosed in those over 50 years and there is no association with socioeconomic status. IBS aggregates within families and the genetic and sociological factors potentially underlying this are reviewed. Patients diagnosed with IBS are highly likely to have other functional disease and have more surgery than the general population. There is no evidence that IBS is associated with an increased mortality risk. The epidemiological evidence surrounding these aspects of the natural history is discussed.

Journal Article Type Article
Publication Date Feb 4, 2014
Deposit Date Apr 28, 2014
Publicly Available Date Apr 28, 2014
Journal Clinical Epidemiology
Print ISSN 1179-1349
Electronic ISSN 1179-1349
Publisher Dove Medical Press
Peer Reviewed Peer Reviewed
Volume 6
Public URL
Publisher URL


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