Table 2.

COX regression analysis between prognostic risk factors and overall survival of ccRCC patients.

Risk factors	Univariate analysis			Multivariate analysis
	HR	95% CI	P value	HR	95% CI	P value
Age	1.803	1.318-2.468	0.000	1.579	1.147-2.175	0.005
Gender	0.948	0.697-1.290	0.736
T stage	3.120	2.306-4.220	0.000	0.827	0.453-1.511	0.537
N stage	3.823	2.070-7.061	0.000	2.029	1.073-3.835	0.029
M stage	4.346	3.192-5.918	0.000	2.144	1.474-3.117	0.000
G stage	2.639	1.885-3.697	0.000	1.542	1.067-2.228	0.021
TNM stage	3.794	2.767-5.202	0.000	2.263	1.140-4.493	0.020
SAA1 expression	2.433	1.770-3.346	0.000	1.538	1.094-2.162	0.013

HR, Hazard ratio; CI, Confidence interval.