Table 2.

Univariate and multivariate logistic regression analyses for predictors of post-PCNL SIRS

Variable	Univariate analysis		Multivariate analysis
	Unadjusted OR	p value	Adjusted OR	p value
Patient characteristics
Age	0.9 (0.97–1.01)	0.61	1.007 (0.96–1.04)	0.7
Gender
Female	0.87 (0.46–1.6)	0.68	1.48 (0.39–5.6)	0.57
Male	1.0		1.0
BMI	1.01 (0.92–1.11)	0.75	1.10 (0.92–1.31)	0.28
Hypertension
Yes	0.94 (0.5–1.7)	0.86	1.03 (0.27–3.9)	0.95
No	1.0
Diabetes mellitus
Yes	1.2 (0.63–2.49)	0.5	0.29 (0.65–1.3)	0.1
No	1.0
History of previous PCNL	1.7 (0.58–5.46)	0.3	1.0 (0.36–1.56)	0.01*
Preoperative laboratory values
Hemoglobin	0.86 (0.7–0.9)	0.04*	0.74 (0.53–1.03)	0.07
TLC	1.19 (1.09–1.3)	0.00006*	1.22 (1.04–1.42)	0.01*
Creatinine	0.98 (0.85–1.12)	0.77	0.72 (0.17–2.96)	0.65
Preoperative pyuria	1.0	0.151	0.99 (0.99–1.002)	0.65
NLR	1.3 (1.09–1.5)	0.003*	1.65 (1.22–2.24)	0.001*
PLR	1.005 (1.001–1.008)	0.006*	1.008 (1.002–1.014)	0.008*
LMR	1.18 (1.04–1.34)	0.008*	1.27 (1.03–1.56)	0.025*
Stone characteristics
Stone volume	1.0	0.8	1.0	0.84
Hounsfield unit (HU)	1.0 (0.99–1.002)	0.3	1.0	0.07
Staghorn	4.361 (1.605–11.846)	0.004*	0.594 (0.032–10.944)	0.726
Stone location (n)
Simple	0.478 (0.394–1.548)	0.61	1.582 (0.205–12.207)	0.660
Complex
Puncture site
Supracostal (n = 75)	0.6 (0.32–1.34)	0.25	0.52 (1.38–1.95)	0.33
Infracostal
Tract size	0.97 (0.92–1.02)	0.25	0.88 (0.69–1.12)	0.31
Bilateral puncture	1.6 (0.5–5.1)	0.3
Simultaneous Ipsilateral URS(n = 442)	1.27 (0.28–5.8)	0.7	1.62 (0.10–24.8)	0.72
PNL type
Standard	0.697 (0.31–1.56)	0.38	0.720 (0.024–21.4)	0.85
Mini PNL
Tubeless
Operative time	1.01 (1.00–1.03)	0.05*	1.02 (0.98–1.06)	0.25
LOH	1.31 (1.15–1.49)	0.00004*	1.46 (1.16–1.83)	0.001*

*Values are statistically significant