Table 3.

Comparison of differential renal function at various periods of time

DRF	P
	Overall	Group 1	Group II
Preoperative versus 3 months	<0.001*	0.02*	<0.001*
Preoperative versus 12 months	<0.001*	0.02*	<0.001*
Preoperative versus 24 months	<0.001*	0.02*	<0.001*
3 versus 12 months	<0.001*	0.24	<0.001*
3 versus 24 months	<0.001*	0.24	<0.001*
12 versus 24 months	<0.001*	0.04*	<0.001*

DRF: Differential renal function, *significant p < 0.05