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Ethnicity â Although Crohnâs disease can affect any ethnic group, Caucasians and people of Eastern European (Ashkenazi) Jewish descent have the highest risk. American Jewish people of European descent are four to five times more likely to develop IBD than the general population.
It is known that as many as 20 to 25 percent of patients with Crohn's disease have a relative with CD or ulcerative colitis. There is also a proportionally higher incidence among certain ethnic groups. Those of eastern European decent and Jewish heritage have a higher incident of the disease.