Table 3.

Prevalence of inflammatory bowel disease in patients with primary sclerosing cholangitis (PSC)

Institution (country of origin)	Number of patients with PSC	Percentage with IBD
Royal Free Hospital (UK)[17]	29	72
Mayo Clinic (USA)[18]	50	70
Huddinge (Sweden)	305	72
King’s College London (UK-children)	13	77
Okolicsanyi (Italy)[19]	82	54
Escorsell (Spain)	43	47
Okada (Japan)[20]	155	23