Table 4.

Univariate and multivariate cox regression analyses for predictors of recurrence-free survival

Covariates	Univariate		Multivariate
	HR (95% CI)	P	HR (95% CI)	P
Gender (reference: Males)	1.430 (0.805-2.538)	0.222
Place of residency (reference: Urban)	0.871 (0.554-1.371)	0.551
Age	1.019 (0.987-1.051)	0.246
Pure urothelial versus urothelial with divergent differentiation	1.229 (0.735-2.054))	0.431
Pure urothelial versus pure nonurothelial	1.464 (0.764-2.807)	0.250
Pathologic N status (reference: N0)
N1	2.068 (1.143-3.742)	0.016
N2	2.890 (1.662-5.027)	0.000
N3	3.218 (1.132-9.142)	0.028
Lymhovascular invasion	2.514 (1.562-4.045)	0.000	1.837 (1.002-3.368)	0.0049
Number of isolated lymph nodes	1.022 (0.979-1.066)	0.324
Number of positive lymph nodes	1.129 (1.047-1.218)	0.002
Positive resection margins	2.234 (1.324-3.769)	0.003	1.980 (1.093-3.587)	0.024

HR: Hazard ratio, CI: Confidence interval