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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.
As some researchers continue to look for the answer in our genes, others are proposing a more provocative theory that invokes factors unique to the Jewish diet and to the environment shared by Jews in recent history. To date, more genes have been linked to Crohnâs than to any other disease. In a single paper published late last year, scientists reported finding 30 new genes associated with Crohnâs, bringing the total of such genes up to 71. (Ulcerative colitis, the other common IBD, isnât far behind, with 47 genes.)