Table 1.

Patient characteristics

Characteristics	Patients (n)	Patients (%)
Total	53	100
Sex
Male	38	71.7
Female	15	28.3
Age (years)
Median	60
Range	33–73
ECOG performance status
0	8	15.1
1	39	73.6
2	6	11.3
Staging
IIIb	5	9.4
IV	48	90.6
Smoking exposure
Smoking	45	84.9
No smoking	8	15.1

Abbreviation: ECOG, Eastern Cooperative Oncology Group.