CRP and vasculitis: This post-hoc analysis of the Japanese phase 3 studies identified independent factors associated with a better response to vadadustat in anemia patients: high baseline hemoglobin, low baseline eGFR, high week-20–24 ferritin, and CKD not caused by autoimmune disease/glomerulonephritis/vasculitis in NDD-CKD and male sex, high baseline CRP, and low baseline ERI in HDD-CKD.