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- What is Irritable Bowel Syndrome (IBS)?
- What is the prevalence of IBS?
- What factors contribute to the onset of IBS
What is Irritable Bowel Syndrome (IBS)?
Irritable Bowel Syndrome (IBS) is part of a spectrum of diseases known as Functional Gastrointestinal Disorders which include diseases such as noncardiac chest pain, nonulcer dyspepsia, and chronic constipation or diarrhea. These diseases are all characterized by chronic or recurrent gastrointestinal symptoms for which no structural or biochemical cause can be found.
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What is the prevalence of IBS?
IBS affects between 25 and 55 million people in the United States and results in 2.5 to 3.5 million yearly visits to physicians. Approximately 20 to 40 percent of all visits to gastroenterologists are due to IBS symptoms.
IBS symptoms affects men and women of all ages and of all races. The prevalence of IBS in the general population of Western countries varies from 6 to 22%. IBS affects 14-24% of women and 5-19% of men. The prevalence is similar in Caucasians and African Americans, but appears to be lower in Hispanics. Although several studies have reported a lower prevalence of IBS among older people, the present studies do not allow to definitely conclude whether or not an age disparity exists in IBS. In non-Western countries such as Japan, China, India, and Africa, IBS also appears to be very common.
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What factors contribute to the onset of IBS?
Many patients with IBS report that their symptoms began during periods of major life stressors such as a divorce, death of a loved one, or school exams. Many patients also report the onset of symptoms during or shortly after recovering from a gastrointestinal infection or abdominal surgeries. Symptoms of IBS have also been known to appear upon the ingestion of a certain food to which the individual is sensitive. The type of food which causes symptoms varies with the individual. (There is no one definite universal food trigger for IBS.) Similarly, a flare of symptoms in a patient with long-standing IBS may be triggered by all of the symptoms listed above, or for no apparent reason.