Table 1. The correlation between GPX1 expression and clinicopathological parameters of ccRCC patients.

Parameter		Number	GPX1 mRNA expression		P value
			Low (n=263)	High (n=263)
Age (years)	<= 60	261	135	126
	>60	265	128	137	0.433
Gender	Male	341	153	188
	Female	185	110	75	0.001
T stage	T1+T2	337	188	149
	T3+T4	189	75	114	0.000
N stage	N0+NX	510	260	250
	N1	16	3	13	0.011
M stage	M0+MX	448	236	212
	M1	78	27	51	0.003
G stage	G1+G2+GX	246	149	97
	G3+G4	280	114	166	0.000
Pathologic stage	Stage I+II	319	183	136
	Stage III+IV	207	80	127	0.000