Table 1.

The characteristics of patient

Variable	Patients (n)
Gender
Male	36
Female	28
Age
<64 y	30
≥64 y	34
Smoking
Never	20
Ever	44
Histology
Adenocarcinoma	37
Squamous cell carcinoma	27
Stage
I	24
II	18
III	14
IV	8
EGFR mutation
Y	12
N	52
Chemoresistance
Y	25
N	39