Table 1.

The Background Information of Patients

	Numbers	Percentage (%)
Age
≤63	16	53.3
>63	14	46.7
Sex
Male	16	53.3
Female	14	46.7
Smoking
No	13	43.3
Yes	17	56.7
Pathological type
Adenocarcinoma	15	50
Squamous cell carcinoma	11	36.7
Others	4	13.3
TNM stage
Stage I	9	30
Stage II	4	13.3
Stage III	8	26.7
Stage IV	9	30
Tumor size stage
T1-T2	24	80
T3-T4	6	20
Lymph node metastasis
N0	10	33.3
N1	7	23.3
N2	11	36.7
N3	2	6.7
Distant metastasis
No	21	70
Yes	9	30