Table 2. Risk factors for early renal impairment.

Variables	Univariate		Multivariate
	Hazard ratio	P value	Hazard ratio	P value
Age ≥ 70 years	1.98	0.417	–	–
Male gender	2.28	0.048	1.56	0.054
Hypertension	1.19	0.806	–	–
Preoperative eGFR < 60	1.90	0.407	–	–
Neoadjuvant chemotherapy	1.69	0.523	–	–
Preoperative hydronephrosis	1.06	0.959	–	–
Postoperative hydronephrosis	6.45	0.014	5.94	0.018