Table 1. Relationship between USP18 expression and clinicopathological features.

Parameters	n	USP18 expression		P value
		Low(n=45)	High(n=63)
Age (years)				P=0.841
≤65	42	18	24
>65	66	27	39
Sex				P=0.579
Female	49	19	30
Male	59	26	33
Tumor size(cm)				P=0.004
<5	75	38	37
≥5	33	7	26
TNM stage				P<0.001
T1-T2	48	36	12
T3-T4	60	9	51
Distant metastasis				P=0.276
No	78	35	43
YES	30	10	20
Lymph node status				P=0.501
No	40	15	25
YES	68	30	38
Histologic grade				P=0.828
High	30	12	18
Low to medium	78	33	45
Differentiation				P<0.0001
Well	37	30	7
Moderate/Poor	71	15	56