Table 2.

Prevalence of primary sclerosing cholangitis in patients with ulcerative colitis

Country of origin	Number of patients with ulcerative colitis	Percentage with primary sclerosing cholangitis
Oxford, UK[9]	681	2.9
Oslo, Norway[12]	336	4
Stockholm, Sweden[11]	1500	3.7 (5.5 in total colitis)