Table 3. Clinical information from the 530 ccRCC patients.

Clinical parameters	Variable	n (total = 530)	Percentages (%)
Age (years)	≤ 60	259	48.9%
	> 60	271	51.1%
Gender	Female	186	35.1%
	Male	344	64.9%
Histological grade	G1	14	2.6%
	G2	227	42.8%
	G3	206	38.9%
	G4	75	14.2%
	GX	5	1.0%
	Unknown	3	0.5%
Pathological stage	Stage I	265	50.0%
	Stage II	57	10.8%
	Stage III	123	23.2%
	Stage IV	82	15.5%
	Unknown	3	0.5%
Survival status	Dead	173	32.6%
	Alive	357	67.4%