Impact Factors and an Efficient Nomogram for Predicting the Occurrence of Sepsis after Percutaneous Nephrolithotomy

Table 2

Clinical and preoperative factors between sepsis and nonsepsis groups.

Variables	Sepsis	Nonsepsis	/	value
Age (years)			-0.993	0.322
Gender			1.855	0.173
Male	9 (60.0)	175 (73.5)
Female	6 (40.0)	56 (26.5)
Diabetes mellitus			5.438	0.028
Yes	7 (46.7)	48 (20.8)
No	8 (53.3)	183 (79.2)
Stone location			0.867	0.648
Renal pelvis	3 (20.0)	72 (31.2)
Calyceal	7 (46.7)	97 (42.0)
Upper ureter	5 (33.3)	62 (26.8)
BMI(kg/m^2)			0.850	0.396
Stone side			0.953	0.621
Right	6 (40.0)	121(52.4)
Left	6 (40.0)	78 (33.8)
Two sides	3 (20.0)	32 (13.8)
Stone number			1.155	0.283
Single	10 (66.7)	121 (52.4)
Multiple	5 (33.3)	110 (47.6)
Staghorn calculi			85.899	<0.001
Yes	11 (73.3)	10 (4.3)
No	4 (26.7)	221 (95.7)
Largest stone size (mm)			2.265	0.024
Serum creatinine (umol/L)			-0.007	0.995
Midstream urine culture			82.968	<0.001
Positive	10 (66.7)	8(3.50)
Negative	5 (33.3)	223(96.5)
The urinary microscopy WBC			11.005	0.027
WBC (+)	1 (6.6)	31 (13.4)	1.425	0.233
WBC (++)	3 (20.0)	48 (20.8)	2.732	0.098
WBC (+++)	4 (26.7)	15 (6.50)	10.105	0.001
WBC (++++)	7 (46.7)	92 (39.8)	3.344	0.067
Preoperative renal fistula			52.894	<0.001
Yes	6 (40.0)	4 (1.8)
No	9 (60.0)	227 (98.2)
Surgery time (min)			0.104	0.977

Statistically significant, BMI: body mass index. The urinary microscopy WBC: at high magnification, urine sediment white blood cell count. WBC (+): urinary sediment microscopy counts of 5—10/HP. WBC (++): urinary sediment microscopic counting 10—15/HP. WBC (+++): urinary sediment microscopic counting 15—20/HP. WBC (++++): urinary sediment microscopic counting >20/HP.