Table 1.

Details of the ccRCC patients’ clinical information

	Clinical index	N	Lost	Total N
Gender	Male	57	1	88
	Female	30
Age	≤60 years	49	2	88
	>60 years	37
Tumor size	≤5 cm	52		88
	>5 cm	36
T staging	T1	57		88
	T2	25
	T3	6
N staging	N0	84		88
	N1-3	2
M staging	M0	86		88
	M1	2
Clinical staging	Stage I	55	2	88
	Stage II	23
	Stage III	6
	Stage IV	2
Pathological grading	I-II	34		88
	III-IV	24