Table I.

Association between FER and clinicopathological characteristics in ccRCC patients.

		FER
Parameters	n	High	Low	χ2	P-value
Total	206	136	70	0.168	0.682
Gender
Male	145	97	48
Female	61	39	22
Age (years)
≥50	137	94	43	1.227	0.268
<50	69	42	27
Size (cm)				8.161	0.004
≥7	84	65	19
<7	122	71	51
T stage				8.542	0.014
T1	139	87	52
T2	34	20	14
T3/4	33	29	4
N stage				6.131	0.013
N0	177	111	66
N+	29	25	4
Metastasis				6.680	0.010
No (M0)	180	113	67
Yes (M1)	26	23	3
Recurrence				8.959	0.003
No	172	106	66
Yes	34	30	4
Fuhrman				12.374	0.006
1	37	18	19
2	124	81	43
3	25	20	5
4	20	18	2

ccRCC, clear cell renal cell carcinoma.