Table 4.

PFS according to baseline characteristics.

	No. of Patients (%)	Median PFS (months)	HR (95%CI)
Age group
<65 years	27 (67.5%)	7.90	0.98 (0.94-1.03)
≥65 years	13 (32.5%)	10.30
Sex
Female	1 (2.5%)	Undefined	Undefined
Male	39 (97.5%)	8.60
Smoking status
Never smoked	3 (7.5%)	11.60	1.61 (0.80-3.24)
Current smoker	32 (80%)	6.80
Former smoker	5 (12.5%)	11.70
Disease stage
III	9 (22.5%)	9.40	1.596 (0.66-3.89)
IV	31 (77.5%)	7.90
ECOG score
0	7 (17.5%)	7.40	1.041 (0.40-2.71)
1	33 (82.5%)	8.70
Brain metastasis at enrollment
YES	3 (7.5%)	6.67	2.66 (0.28-24.97)
NO	37 (92.5%)	8.63
Liver metastases at enrollment
YES	6 (15%)	6.70	1.69 (0.53-5.42)
NO	34 (85%)	9.37