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.