Bland-Altman methods between preadmission serum creatinine and various surrogates methods for estimating baseline serum creatinine. (a) first serum creatinine, (b) minimal serum creatinine, (c) MDRD computed serum creatinine, (d) CKD-EPI computed serum creatinine. SCr: serum creatinine; MDRD: Modification of Diet in Renal Disease; CKD-EPI: Chronic Kidney Disease Epidemiology Collaboration. (PNG 78 kb)