Forest plots showing ORs of risk factors in patients with ECC and its subtypes against their controls. (A,B) Patients with IBD, HCV, cirrhosis, and other liver diseases had significantly higher risk of ECC and pCCA, whereas patients with diabetes and history of statin use had lower risk of these cancers. (C) Patients with other liver diseases had significantly higher risk of dCCA, and those with a history of statin use had lower risk of dCCA.