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a) Mean estimated glomerular filtration rate (eGFR) at baseline calculated by the MDRD, CG and corrected CG, versus age category. b) Mean eGFR at baseline calculated by the MDRD, CG, and corrected CG, versus body mass index (BMI) category. CG = Cockcroft-Gault equation; MDRD = Modification of Diet in Renal Disease study equation.
