[Retracted] Factors Affecting Transfusion during Percutaneous Nephrolithotomy: A Retrospective Study of 665 Cases

Table 3

Renal factors according to transfusion.

Parameters	Transfusion (+) %	Transfusion (-) %	value
	23	642
Grade of hydronephrosis			0.104^a
Nil or mild	17.4 (4)	33.6 (216)
Moderate or severe	82.6 (19)	66.4 (426)
Abnormal anatomy			0.067^b
(+)	13.0 (3)	3.9 (25)
(-)	87.0 (20)	96.1(617)
History of stone surgery
Open surgery			0.039^b
(+)	21.7 (5)	8.1 (52)
(-)	78.3 (18)	91.9 (590)
PCNL			0.485^a
(+)	17.4 (4)	23.7 (152)
(-)	82.6 (19)	76.3 (490)
URSL			0.433^a
(+)	21.79 (5)	29.39 (188)
(-)	78.3 (18)	70.7 (454)
SWL			1^b
(+)	8.7 (2)	10.4 (67)
(-)	91.3 (21)	89.6 (575)

^aChi-square test. ^bFisher’s exact test.