Table 2.

Multivariate Cox proportional hazards model for renal cell carcinoma-specific survival

	Variable	Risk ratio	95% confidence interval (CI)	P-value
All RCC	c-Met AQUA score	1.013	1.002–1.023	0.015
	Fuhrman grade III/IV versus I/II	3.202	1.904–5.385	<0.001
	Stage III/IV versus I/II	5.304	3.083–9.126	<0.001
Clear cell	c-Met AQUA score	1.017	1.003–1.032	0.018
	Fuhrman grade III/IV versus I/II	2.337	1.284–4.256	0.005
	Stage III/IV versus I/II	4.321	2.260–8.264	<0.001