The Chronic Kidney Disease-Epidemiology Collaboration (CKD-EPI) equation does not improve the underestimation of Glomerular Filtration Rate (GFR) in people with diabetes and preserved renal function

Table 4 Classification of the study population into CKD stages based on mGFR according to the MDRD or CKD-EPI equation

CKD stage according to mGFR	N	Classification based on the MDRD formula			Classification based on the CKD-EPI formula
		Sensitivity	Specificity	Correctly classified	Sensitivity	Specificity	Correctly classified
≥ 90 (Stage 1)	81	64.2 %	88.98 %	78.89 %	76.5 %	84.75 %	81.41 %
60-89 (Stage 2)	58	65.5 %	70.92 %	69.35 %	58.6 %	76.6 %	71.36 %
<60 (Stage ≤ 3)	60	80 %	94.96 %	90.45 %	76.7 %	95.68 %	89.95 %

mGFR measured Glomerular Filtration Rate, CKD chronic kidney disease, MDRD modification of diet in renal disease, CKD-EPI Chronic Kidney Disease-Epidemiology Collaboration

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