Ulcerative colitis affects about the same number of women and men. Risk factors may include:

  • Age. Ulcerative colitis usually begins before the age of 30. But, it can occur at any age, and some people may not develop the disease until after age 60.
  • Race or ethnicity. Although whites have the highest risk of the disease, it can occur in any race. If you're of Ashkenazi Jewish descent, your risk is even higher.
  • Family history. You're at higher risk if you have a close relative, such as a parent, sibling or child, with the disease.
  • Isotretinoin use. Isotretinoin (Amnesteem, Claravis, Sotret; formerly Accutane) is a medication sometimes used to treat scarring cystic acne or acne. Some studies suggest it is a risk factor for IBD, but a clear association between ulcerative colitis and isotretinoin has not been established.
Sep. 09, 2014

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