The geographic distribution of UC and Crohn's disease is similar worldwide, with the highest number of new cases a year of UC found in Canada, New Zealand and the United Kingdom. The disease is more common in North America and Europe than other regions. In general, higher rates are seen in northern locations compared to southern locations in Europe and the United States. UC is more common in western Europe compared with eastern Europe. Worldwide, the prevalence of UC varies from 2 to 299 per 100,000 people. Together, ulcerative colitis and Crohn's disease affect about a million people in the United States.
The geographic distribution of UC a.nd Crohn's disease is similar worldwide, with the highest number of new cases a year of UC found in Canada, New Zealand and the United Kingdom. The disease is more common in North America and Europe than other regions. In general, higher rates ar.e seen in northern locations compared to southern locations in Europe and the United States. UC is more common in western Europe compared with eastern Europe. Worldwide, the prevalence of UC varies from 2 to 299 per 100,000 people. Together, ulcerative colitis and Croh:n's disease affect about a million people in th!e United States.