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  • Title: MDRD versus CKD-EPI equation to estimate glomerular filtration rate in kidney transplant recipients.
    Author: Masson I, Flamant M, Maillard N, Rule AD, Vrtovsnik F, Peraldi MN, Thibaudin L, Cavalier E, Vidal-Petiot E, Bonneau C, Moranne O, Alamartine E, Mariat C, Delanaye P.
    Journal: Transplantation; 2013 May 27; 95(10):1211-7. PubMed ID: 23511243.
    Abstract:
    BACKGROUND: The new Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) creatinine-based equation was developed to address the systematic underestimation of the glomerular filtration rate (GFR) by the Modification of Diet in Renal Disease (MDRD) Study equation in patients with a relatively well-preserved kidney function. The performance of the new equation for kidney transplant recipients is discussed. METHODS: We analyzed the performances of the CKD-EPI equation in comparison with the MDRD Study equation in 825 stable kidney transplant recipients. Bias, precision, and accuracy within 30% of true GFR were determined. GFR was measured by urinary clearance of inulin (n=488) and plasma clearance of Cr-EDTA (n=337). RESULTS: Mean measured GFR (mGFR) was 50±19 mL/min/1.73 m. On the whole cohort, bias was significantly lower for MDRD Study equation compared with CKD-EPI creatinine. This superiority translates into a better accuracy (80% and 74% for the MDRD and CKD-EPI creatinine, respectively). The best performance of the MDRD Study equation is confirmed both in the subgroups of patients with mGFR <60 mL/min/1.73 m and between 60 and 90 mL/min/1.73 m. For mGFR >90 mL/min/1.73 m, there were no significant differences between the two equations in terms of performance. CONCLUSIONS: The CKD-EPI creatinine equation does not offer a better GFR prediction in renal transplant patients compared with the MDRD Study equation, even in the earlier CKD stages.
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