Table 1.

Basic features of renal cell cancer patients in FUSCC database.

Variables	Training set		Validation set		P
	N	%	N	%
Age					0.221
<60	110	61.1	48	53.3
≥60	70	38.9	42	46.7
Sex					0.503
Female	53	29.4	23	25.6
Male	127	70.6	67	74.4
Grade					0.438
I-II	89	49.4	49	54.4
III-IV	91	50.6	41	45.6
Stage					0.351
I	144	80	69	76.7
II	20	11.1	8	8.9
III	16	8.9	13	14.4
Histological type					0.438
ccRCC	149	82.8	71	78.9
pRCC	31	17.2	19	21.1

FUSCC: Fudan University Shanghai Cancer Center; ccRCC: clear cell renal cell cancer; pRCC: papillary renal cell cancer.