Table 3. Univariate and multivariate analysis for cancer specific survival (CSS) in kidney cancer patients.

Variables	5-year CSS	Univariate analysis		Multivariate analysis
		Log rank Χ2	P value	HR	95% CI	P value
Sex
Male	79.50%	13.26	<0.001	Reference
Female	81.00%			1.01	0.98-1.04	0.524
Age
<60	84.10%	2813.62	<0.001	Reference
60-70	81.20%			1.07	1.03-1.11	0.001
70-80	79.00%			1.14	1.09-1.19	<0.001
>80	63.30%			1.52	1.45-1.60	<0.001
Race
White	79.90%	79.39	<0.001	Reference
Black	81.60%			0.99	0.95-1.04	0.736
American Indian/Alaska Native	75.90%			1.00	0.87-1.16	0.970
Asian/Pacific Islander	78.90%			0.98	0.92-1.05	0.583
Unknown	93.60%			0.42	0.29-0.61	<0.001
Grade
High/Moderate	93.90%	12360.56	<0.001	Reference
Poor/Undifferentiation	72.30%			2.22	2.12-2.33	<0.001
Unknown	62.90%			2.12	2.02-2.23	<0.001
TNM
I	96.20%	65843.40	<0.001	Reference
II	87.90%			3.07	2.84-3.32	<0.001
III	76.90%			1.28	1.09-1.51	0.003
IV	17.20%			3.75	3.16-4.46	<0.001
Unknown	67.20%			2.57	2.28-2.90	<0.001
SEER Stage
Localized	94.90%	67229.90	<0.001	Reference
Regioned	73.20%			4.55	3.91-5.30	<0.001
Distant	15.90%			8.24	7.00-9.73	<0.001
Unstage	52.80%			2.77	2.44-3.14	<0.001
Marital Status
Married	82.10%	1039.78	<0.001	Reference
Divorced/Separated	77.80%			1.20	1.15-1.26	<0.001
Widowed	70.40%			1.24	1.19-1.30	<0.001
Single	80.10%			1.14	1.09-1.19	<0.001
Therapy
Surgery, radiation or both	86.00%	21427.48	<0.001	Reference
No surgery, radiation	42.00%			2.09	2.00-2.18	<0.001
Unknown	53.20%			2.25	2.01-2.51	<0.001