Table 1.

Correlation between circ USP7 and clinical characteristics in 126 NSCLC patients

Variables	CircUSP7 expression level		p value
	Low	High
Age
60<	31	34	0.722
60≥	32	29
Gender
Male	35	39	0.587
Female	28	24
Smoking status
Smokers	40	43	0.707
Nonsmokers	23	20
Histological type
Squamous cell carcinoma	18	21	0.700
Adenocarcinomas	45	42
Tumor stage
I-II	27	34	0.285
III-IV	36	29
Tumor size
≤ 3	36	21	0.012
>  3	27	42
Lymph node metastasis
Yes	20	34	0.019
No	43	29
Intravascular cancer embolus
Yes	17	29	0.041
No	46	34
Differentiation
Well and moderate	37	35	0.857
Poor	26	28