Table 1.

Patient characteristics

Characteristic	No. of patients	Percent
Age
≤75	31	51
>75	30	49
Gender
Male	20	33
Female	41	67
ECOG performance status
0	4	7
1	28	46
2	22	36
3	7	11
Smoking status
Never	4	7
Former	44	72
Current	13	21
Tobacco history (pack-years)
0	4	7
<40	20	33
40–50	21	34
>50	16	26
Baseline oxygen dependence
Yes	19	31
No	42	69
Reason for inoperability
Age	11	18
Pulmonary dysfunction	49	80
Other medical comorbidities	1	2