Table 2.

Patient characteristics

Variables	n	%
Gender
Male	26	68.4
Female	12	31.6
Age (years)
<60	24	63.2
≥60	14	36.8
Smoking
Never	12	31.6
Ever	26	68.4
T stage
T1 or 2	32	84.2
T3 or 4	6	15.8
N stage
N0	18	47.4
N1 or 2	20	52.6
TNM
I	14	36.8
II or III	24	63.2
Pathology
ADC	19	50.0
SCC	13	34.2
Others	6	15.8
Chemotherapy
Yes	16	42.1
No	22	57.9
Radiotherapy
Yes	3	7.9
No	35	92.1

Abbreviations: ADC, adenocarcinoma; SCC, squamous cell carcinoma.