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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.
The cause of Crohn's disease is unknown, but genetics is one of the many areas being explored as a potential culprit. Since Ashkenazi Jews also have a higher risk for Crohn's, the genetic link is being explored as a possible explanation.One study measured the risk of having the disease in Ashkenazim by checking the genetic makeup of a group of Ashkenazim with Crohnâs and a group without it.rohn's disease has been found to be quite prevalent among a specific Jewish population from Eastern Europe known as the Ashkenazim.