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Estimated accuracy of CKD-EPI SCr-SCysC equation and the Modification of Diet in Renal Disease (MDRD) Study equation in estimating six different gold standard measured glomerular filtration rates (mGFRs): reference mGFR, average of two mGFRs, and the average of three mGFRs without and with limiting the analysis to consistent (within 25% of each other) mGFRs. P30 is calculated as the percentage of estimated GFR within 30% of the gold standard (the average of three mGFRs).
