It is estimated that over 200,000 Canadians are affected by IBD. The number of those with Crohn’s disease is slightly higher than the number of people with ulcerative colitis. Males and females are affected equally. Crohn’s disease may occur in people of all ages, but it is most prevalent in adolescents and young adults, affecting mainly those between 15 and 35. The diagnosis of ulcerative colitis can occur at any age, although more children are affected by Crohn’s disease. Although IBD is most often diagnosed in patients between 12 -35 years old, it can less commonly occur in people who are 70 or older and in young children as well. In fact, about 20 percent of those affected are children and adolescents.