Table 1.

Characteristics of the patients.

Parameters	Variables	Number
Total number		32
Age, years	Mean ± SD	70.0 ± 11.5
Sex	Male	12 (37.5%)
	Female	20 (62.5%)
Smoking history	Smoker	19 (59.4%)
	Non-smoker	13 (40.6%)
Tumor size, mm	Mean ± SD	24.3 ± 14.3
Tumor location	Central	1 (3.1%)
	Middle	7 (21.9%)
	Peripheral	24 (75%)
Histology	Adenocarcinoma	22 (68.8%)
	Squamous cell carcinoma	6 (18.8%)
	Pleomorphic carcinoma	2 (6.3%)
	Adenosquamous cell carcinoma	1 (3.1%)
	Large cell neuroendocrine carcinoma	1 (3.1%)
Pathological stage	I	25 (78.1%)
	II	3 (9.4%)
	III	3 (9.4%)
	IV	1 (3.1%)