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. 2018 Jul 3;68(673):e524–e530. doi: 10.3399/bjgp18X697937

Table 2.

Mean eGFR and CKD diagnosis based on single or duplicate measures using the MDRD and CKD-EPI equations

MDRD equation, n= 485 CKD-EPI equation, n= 476a
eGFR (ml/min/1.73 m2) using first measure, mean (SD) 66.4 (12.2) 67.5 (12.1)
eGFR (ml/min/1.73 m2) using second measure, mean (SD) 66.9 (11.9) 68.3 (12.2)
eGFR (ml/min/1.73 m2) using both measures, mean (SD) 66.6 (12.1) 67.9 (12.0)
Classified as having CKD based on first eGFR alone, n (%) 311 (64) 301 (63)
Classified as having CKD based on two positive eGFRs, n (%) 190 (39) 182 (38)
Incorrectly classified using a single measure, n (%) 121 (25) 119 (25)
a

Nine patients excluded as sex missing. CKD = chronic kidney disease. CKD-EPI = Chronic Kidney Disease Epidemiology Collaboration. eGFR = estimated glomerular filtration rate. MDRD = Modification of Diet in Renal Disease. SD = standard deviation.