Table 2 Glomerular filtration rate in ml/min/1.73 m2 based on measured creatinine clearance (CrCl), and estimated by the Cockcroft and Gault, Robert, sMDRD, and CKD-EPI formulas in patients without (A) and patients with ARC (B)
(A) Measures of GFR in patients without ARC (n = 240) ml/min/1.73 m2 | Measured CrCl | CG formula | Robert formula | sMDRD equation | CKD-EPI equation |
|---|---|---|---|---|---|
Mean ± SD | 79.4 ± 30.4 | 98.3 ± 38.5 | 72.2 ± 23.3 | 101.9 ± 39 | 90.7 ± 24.9 |
Coefficient of variation (%) | 38.2 | 39.1 | 32.3 | 38.4 | 27.5 |
Bias | – | 18.8 | −7.3 | 22.5 | 11.3 |
Precision | – | 31.7 | 25.1 | 34.6 | 25.3 |
(B) Measures of GFR in patients without ARC (n = 120) ml/min/1.73 m2 | Measured CrCl | CG formula | Robert formula | sMDRD equation | CKD-EPI equation |
|---|---|---|---|---|---|
Mean ± SD | 173.4 ± 44.3 | 137.6 ± 34.4 | 94.8 ± 24 | 132.5 ± 36.9 | 115.4 ± 18.9 |
Coefficient of variation (%) | 25.5 | 25 | 25.5 | 27.9 | 16.3 |
Bias | – | −35.7 | −78.6 | −40.9 | −57.9 |
Precision | – | 47. | 78.6 | 51.9 | 58.3 |