. 2011 Dec 2;9:158. doi: 10.1186/1477-7819-9-158

Table 2.

Cox regression analysis in overall survival of RCC patients

Risk factors	RR	95%CI	P
Primary tumor stage
T_{1, 2}	1.579	0.763-3.266	0.218
T_{3, 4}
Distant metastasis
M₀	5.859	2.186-15.706	< 0.0001
M₁
HPA staining
Negative	3.584	1.448-8.870	0.006
Positive
MVD
Low	0.930	0.453-1.911	0.844
High

RR: relative risk; 95% CI: 95% confidence interval