Predictor	Harrell’s c-statistic	HR (95% CI)	Pp-value
Multivariate analysis
Berden's class only	0.67	3.61 (1.15 to 11.34)	0.028
Berden's class + BCR	0.76	3.61 (1.15 to 11.34)	0.028
Renal risk score (Brix) only	0.62	5.25 (1.53 to 18.08)	0.009
Renal risk score + BCR	0.73	5.25 (1.53 to 18.08)	0.009

Prognostic performance (with relative Harrell’s c-statistic) of Berden's classes and Brix risk groups with/without the Bowman’s capsule rupture (BCR) assessment and relative multivariate analysis. Statistically significant differences are reported with a bold p-value.