Table 1.

Characteristics of the study populations at the time of analysis.

Variables	n (%)
Age (years)
median (range)	57 (28-78)
Sex
male	106 (33.3)
female	212 (66.7)
Smoking status
nonsmoker	251 (78.9)
smoker	67 (21.1)
ECGO
0-1	288 (90.6)
2	30 (9.4)
TNM stage
IIIB	102 (32.1)
IV	216 (67.9)

ECOG, European Cooperative Eastern Group Classification.