Table 1.

Patient characteristics enrolled in this study (n = 31)

Variable	Number	Percentage(%)
Total	31	100
Age (years)
≤ 55	16	51.7
> 55	15	48.4
Gender
Male	25	80.6
Female	6	19.4
Smoking
Non-smoker	8	25.8
Smoker	23	74.2
Histology
Adenocarcinoma	11	35.5
Non-adenocarcinoma	20	64.5
Histologic grading
Poorly	16	51.6
Moderate and well	15	48.4
Venous invasion
Negative	23	74.2
Positive	8	25.8
Pathological stage
I/II	17	54.8
III	14	45.2