Table II.

Impact of miR-9s methylation on overall survival.

Factors	Median OS (month)	P-value
miR-9s methylation		0.049
Positive	33.3
Negative	31.1
Age (years)		0.3
≤66	36.4
>66	28.3
Gender		0.013
Male	29.1
Female	34.9
Smoking history		0.006
Never	35.5
Ever	28.3
Histology		0.017
AD	33.1
Non-AD	25.2
Stage		<0.0001
I	33.0
II and III	27.0
p-N		0.002
Negative	32.6
Positive	29.9

AD, adenocarcinoma; OS, overall survival; p-N, pathological lymph nodal metastasis.