Table 1. Multivariate Cox regression analysis of potential prognostic factors for ccRCC patients.

Variables	Overall survival			Disease free survival
	HR	95%CI of HR	P	HR	95%CI of HR	P
Risk score	1.26	1.10-1.43	0.00054	1.18	1.01-1.39	0.038
Age	1.50	1.10-2.05	0.01	1.14	0.78-1.66	0.50
Gender	1.18	0.85-1.63	0.32	0.80	0.54-1.21	0.29
Grade	1.37	1.08-1.73	0.0094	1.67	1.27-2.20	0.0002
Stage	1.60	1.37-1.86	1.76e-09	2.29	1.90-2.77	2e-16