Patients categorised by CKD stage using a single and two eGFR measures for the MDRD and CKD-EPI equations
| CKD stage | MDRD equation | CKD-EPI equation | ||||||
|---|---|---|---|---|---|---|---|---|
| Single eGFR (n= 311), n (%) | Two eGFRs, n= 190 | Single eGFR (n= 301), n (%) | Two eGFRs, n= 182 | |||||
| Second eGFR, n (%) | Highest eGFR, n (%) | Mean of both eGFRs, n (%) | Second eGFR, n (%) | Highest eGFR, n (%) | Mean of both eGFRs, n (%) | |||
| Stage 1 | 41 (13) | 14 (7) | 20 (11) | 10 (5) | 19 (6) | 4 (2) | 7 (4) | 5 (3) |
| Stage 2 | 142 (46) | 85 (45) | 91 (48) | 96 (51) | 166 (55) | 91 (50) | 100 (55) | 98 (54) |
| Stage 3A | 115 (37) | 77 (41) | 70 (37) | 71 (37) | 102 (34) | 72 (40) | 65 (36) | 65 (36) |
| Stage 3B | 13 (4) | 14 (7) | 9 (5) | 13 (7) | 13 (4) | 15 (8) | 10 (5) | 14 (8) |
| Stage 4 | – | – | – | – | 1 (0) | – | – | – |
| Stage 5 | – | – | – | – | – | – | – | – |
CKD = chronic kidney disease. CKD-EPI = Chronic Kidney Disease Epidemiology Collaboration. eGFR = estimated glomerular filtration rate. MDRD = Modification of Diet in Renal Disease.