Table 5 –
Difference in R2(with 95% confidence interval) between nephrometry scores for univariate and multivariable models
| Outcome | ABC vs RENAL | ABC vs PADUA | RENAL vs PADUA |
|---|---|---|---|
| Univariate | |||
| Estimated blood loss | 0.005 (−0.033 to 0.059) | 0.005 (−0.029 to 0.052) | 0.001 (−0.024 to 0.026) |
| Ischemia time | −0.011 (−0.065 to 0.045) | −0.006 (−0.052 to 0.045) | 0.005 (−0.037 to 0.046) |
| Multivariable | |||
| Estimated blood loss | 0.013 (−0.020 to 0.065) | 0.011 (−0.018 to 0.058) | −0.002 (−0.024 to 0.017) |
| Ischemia time | −0.006 (−0.050 to 0.043) | −0.012 (−0.057 to 0.033) | −0.006 (−0.048 to 0.028) |
The new Arterial Based Complexity (ABC) scoring system for evaluating kidney tumors before partial nephrectomy (PN) performed as well as the established RENAL and PADUA scoring systems. ABC performance in predicting estimated blood loss and ischemia time outcomes in PN was similar to RENAL and PADUA. The ABC score provides similar information on tumor complexity and perioperative outcomes with, presumably, a shorter learning curve than the other two systems.