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

Table 1

Comparison of perioperative conditions between the two groups.

Group	Number of cases	Procedure duration (min)	Intraoperative blood loss (ml)	Stone clearance (n (%))	Length of stay (d)	VAS (points)
Study group	44	42.26 ± 7.03	12.35 ± 2.43	42 (95.45)	6.09 ± 1.28	2.92 ± 0.96
Control group	44	61.38 ± 10.35	39.97 ± 8.91	40 (90.91)	9.71 ± 3.44	3.87 ± 1.05
T/χ^2 value		10.137	19.838	0.179	6.542	4.429
value		<0.001	<0.001	0.672	<0.001	<0.001