Estimation of GFR: A Comparison of New and Established Equations

Mean bias by quartile of 24-hour urinary creatinine (Cr) excretion using the Cockcroft-Gault (CG), Modification of Diet in Renal Disease (MDRD) Study, quadratic, and CKD Epidemiology Collaboration (CKD-EPI) equations. The broken line is the identity line (no difference between mGFR and eGFR). Table shows urinary Cr excretion, sex, age, weight, and height (mean or prevalence) by quartile. Definition of quartiles was done separately for sex and age decade.