Table 5. Correlation of Factors With Magnitude of Long-Term eGFR Decline (N = 68).

Factor	Correlation coefficient (Pearson/Tau)	P-value	Interpretation (direction of decline)
Total RENAL score	−0.454 (inverse)	< 0.001	Correlates with greater decline
Tumor size	−0.500 (inverse)	< 0.001	Correlates with greater decline
Intraoperative blood loss	−0.353 (inverse)	0.012	Correlates with greater decline
Pre-operative eGFR	0.546 (positive)	< 0.001	Correlates with less decline (protective)
eGFR of contralateral kidney	0.349 (positive)	0.014	Correlates with less decline (protective)

eGFR: estimated glomerular filtration rate.