Table 2 Performance of the equations in the development sample using 10-fold cross-validation and temporary validation sample.
Equations | RMSE | r | P15 | P30 | Median bias (Q1, Q3) | CC% |
|---|---|---|---|---|---|---|
Development sample using 10-fold cross-validation (n = 583) | ||||||
L6 | 18.4 | 0.86 | 58.0 | 83.2 | -2.5 (-13.1, 7.9) | 72 |
G6 | 18.2 | 0.86 | 58.5 | 82.5 | -0.7 (-11.5, 9.6) | 73.2 |
Q6 | 18.0 | 0.87 | 60.7 | 83.2 | -0.3 (-10.1, 9.0) | 73.8 |
MDRD-4 | 21.8 | 0.83 | 44.1 | 81.3 | -8.8 (-18.9, 4.2) | 63.8 |
MDRD-6 | 20.7 | 0.84 | 50.3 | 82.8 | -7.0 (-17.3, 5.0) | 65.9 |
MCQ | 21.7 | 0.82 | 47.2 | 77.9 | 6.9 (-5.7, 17.6) | 71.2 |
CKD-09 | 18.3 | 0.87 | 58.0 | 84.4 | -4.3 (-13.8, 6.0) | 73.6 |
CKD-21 | 17.9 | 0.87 | 61.2 | 83.7 | -0.6 (-10.1, 9.5) | 73.9 |
EKFC | 19.7 | 0.87 | 50.4 | 84.9 | -7.1 (-18.6, 3.3) | 69.8 |
Temporary validation sample (n = 78) | ||||||
AE (Q6) | 15.0 | 0.89 | 60.2 | 89.7 | -1.1 (-12.1, 6.9) | 79.5 |
MDRD-4 | 21.8 | 0.88 | 39.7 | 83.3 | -13.4 (-25.2, -1.4) | 61.5 |
MDRD-6 | 18.8 | 0.89 | 46.2 | 89.7 | -9.8 (-21.2, 0.4) | 61.5 |
MCQ | 17.2 | 0.89 | 51.3 | 83.3 | 7.5 (-1.5, 19.8) | 66.7 |
CKD-09 | 16.8 | 0.88 | 57.7 | 88.5 | -4.6 (-16.2, 2.4) | 70.5 |
CKD-21 | 15.4 | 0.89 | 61.5 | 85.9 | -1.1 (-12.4, 6.4) | 74.4 |
EKFC | 18.2 | 0.88 | 52.6 | 87.2 | -7.6 (-21.8, 0.7) | 70.5 |
