Table 1. Relationship between Clinicopathological Variables and OSR1 Expression Level in RCC Patients.

Classification	Number	Low expression, n(%)	High expression, n(%)	P
Tissues
Normal	75	20(26.7)	55(73.3)	<0.0001*
RCC	75	62(82.7)	13(17.3)
Age (year)
<60	29	23(79.3)	6(20.7)	0.542
≥60	46	39(84.8)	7(15.2)
Gender
male	50	40(80.0)	10(20.0)	0.524
female	25	22(88.0)	3(12.0)
Clinical stage
I~II	52	44(84.6)	8(15.4)	0.503
III~IV	23	18(78.3)	5(21.7)
Histologic grade
poorly differentiated	28	26 (92.8)	2(7.1)	0.002*
moderate differentiated	22	20 (90.9)	2(9.1)
well differentiated	25	16(64)	9(36)

Low expression including no(−) and weak(+) staining, high expression including moderate (++) and strong (+++) staining.