Irritable Bowel Syndrome - Epidemiology

Epidemiology

Studies have reported that the prevalence of IBS varies by country and by age range examined. The bar graph at right shows the percentage of the population reporting symptoms of IBS in studies from various geographic regions (see table below for references).

The following table contains a list of studies performed in different countries that measured the prevalence of IBS and IBS-like symptoms:

Percentage of population reporting symptoms of IBS in various studies from various geographic areas
Country Prevalence Author/Year Notes
Canada 6% Boivin, 2001
Japan 10% Quigley, 2006 Study measured prevalence of GI abdominal pain/cramping
United Kingdom 8.2%

10.5%

Ehlin, 2003

Wilson, 2004

Prevalence increased substantially 1970–2004
United States 14.1% Hungin, 2005 Most undiagnosed
United States 15% Boivin, 2001 Estimate
Pakistan 14% Jafri, 2007 Much more common in 16–30 age range. Of IBS patients, 56% male, 44% female
Pakistan 34% Jafri, 2005 College students
Mexico City 35% Schmulson, 2006 n=324. Also measured functional diarrhea and functional vomiting. High rates attributed to "stress of living in a populated city."
Brazil 43% Quigley, 2006 Study measured prevalence of GI abdominal pain/cramping
Mexico 46% Quigley, 2006 Study measured prevalence of GI abdominal pain/cramping

A study of United States residents returning from international travel found a high rate of IBS and persistent diarrhea that developed during travel and persisted upon return. The study examined 83 subjects in Utah, most of whom were returning missionaries. Of the 68 who completed the gastrointestinal questionnaire, 27 reported persistent diarrhea that developed while traveling, and 10 reported persistent IBS that developed while traveling.

Read more about this topic:  Irritable Bowel Syndrome

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