Table 2.

Association between levels of circRNA_001846 expression and clinicopathological characteristics

Clinical features	Case	circRNA_001846 expression
		Low	High	P-value
Age				0.158
>60	121	63	58
≦60	85	40	45
Gender				0.128
Male	112	54	58
Female	94	49	45
Histological type				0.097
Adenocarcinoma	111	51	60
Squamous cell carcinoma	95	52	43
Smoking status				0.209
Ever	153	72	81
Never	53	31	22
Lymph node metastasis				0.002
Positive	99	29	70
Negative	107	74	33
Tumor differentiation				0.001
Well + moderate	105	81	24
Poor	101	22	79
TNM stage				0.001
I + II	109	29	80
III + IV	97	74	23