[Retracted] Effect of Percutaneous Nephrolithotomy Combined with Needle Nephrolithotomy on Renal Function and Complication Rate in Patients with Complex Renal Calculi

Table 2

Comparison of renal function indicators between the two groups.

Time	Group	Number of cases	BUN (mmol/L)	Scr (μmol/L)	CysC (μg/L)
Before surgery	Study group	44	6.06 ± 1.45	75.54 ± 8.48	490.11 ± 20.37
	Control group	44	6.42 ± 1.71	72.77 ± 9.09	485.88 ± 22.65
	T value		1.065	1.478	0.921
	value		0.290	0.143	0.360
1 d after surgery	Study group	44	7.51 ± 1.14	84.68 ± 10.68	585.16 ± 32.19
	Control group	44	8.78 ± 1.65	93.15 ± 11.79	659.13 ± 38.38
	T value		4.201	3.532	9.795
	value		<0.001	0.001	<0.001