Table 1.

Cinical variables (gender, smoking status) and tumor histological features

Variables
Gender
Male	14 (48.2%)
Female	15 (51.7%)
Race
Caucasian	26 (89.6%)
African American	2 (6.8%)
Undetermined	1 (3.4%)
Age
Median	65.7 yr
Range	42–81 yr
Smoking history
Active	10 (34.4%)
Former	16 (55.1%)
Never	2 (6.8%)
Undetermined	1 (3.4%)
Histology
Adenocarcinoma	15 (51.7%)
Squamous	11 (37.9%)
Large cell	1 (3.4%)
Undetermined	2 (6.8%)
Tumor stage
IA/IB	15 (51.7%)
IIA/IIB	6 (20.6%)
IIIA/IIIB	7 (24.1%)
Undetermined	1 (3.4%)