Influencing Factors of Massive Hemorrhage and High-Grade Renal Vascular Injury after PCNL: A Retrospective Comparative Study

Table 6

Multivariate analysis of risk factors for high-grade vascular injury.

	β	SE	Waldχ2		OR	95% CI
Grade IV
Decreased hemoglobin	−0.207	0.073	8.110	0.004	0.813	0.705∼0.938
Operative time	0.023	0.015	2.524	0.112	1.024	0.995∼1.054
Age	−0.080	0.040	3.993	0.046	0.923	0.853∼0.998
Diabetes	−2.669	1.395	3.660	0.056	0.069	0.004∼1.067
History of ipsilateral kidney surgery	−2.093	1.136	3.396	0.065	0.123	0.013∼1.142
Grade V
Decreased hemoglobin	−0.426	0.150	8.066	0.005	0.653	0.487∼0.876
Operative time	0.007	0.027	0.064	0.801	1.007	0.954∼1.063
Age	−0.243	0.092	7.026	0.008	0.784	0.655∼0.939
History of ipsilateral kidney surgery	−22.578	7117.067	0.000	0.997	1.565E − 10	a

a. Floating point overflow occurred while computing this statistic. Its value is therefore set to system missing.