Table 1. Baseline demographics and disease characteristics.

Characteristics	No. of patients (%)
Gender
Male	37 (66.1)
Female	19 (33.9)
Age (years)
Median	58
Range	29-79
<58 years	22 (39.3)
≥58 years	34 (60.7)
Smoking status
Former or current smoker	33 (58.9)
Never smoker	23 (41.1)
ECOG performance status
0	15 (26.8)
1	27 (48.2)
2	14 (25.0)
Stage
Stage IIIB	8 (14.3)
Stage IV	48 (85.7)
Ki-67 positivity
≤15%	24 (42.9)
>15%	32 (57.1)

ECOG = Eastern Cooperative Oncology Group.