Demographics and patient characteristics stratified by compliance to the 6-month follow-up protocol
| Baseline | Completed 6-month follow-up | Dropout at 6 months | |
| Patients | 80 | 65 | 15 |
| Age years | 68±9 69 (46–82) | 68±9 67 (51–82) | 68±11 0 (46–81) |
| Males | 46 (58) | 39 (60) | 7 (47) |
| COPD# | |||
| Mild: FEV1 ≥80% pred | 8 (10) | 8 (12) | 0 |
| Moderate: FEV1 50–80% pred | 15 (15) | 9 (14) | 6 (8) |
| Severe: FEV1 30–50% pred | 6 (8) | 6 (9) | 0 |
| Previous cancer diagnosis | 31 (40) | 24 (37) | 7 (44) |
| Pack-years¶ | 35 (30) | 33 (28) | 47 (36) |
| DLCO % pred | 67 (17) | 67 (16) | 67 (17) |
| ASA physical status | |||
| 2 | 64 (80) | 52 (80) | 12 (80) |
| 3 | 16 (20) | 13 (20) | 3 (20) |
| ECOG performance status | |||
| 0 | 51 (64) | 44 (68) | 7 (47) |
| 1 | 29 (36) | 21 (33) | 8 (53) |
Values are presented as n, mean±sd, median (minimum–maximum range) or n (%). COPD: chronic obstructive pulmonary disease; FEV1: forced expiratory volume in 1 s; DLCO: diffusing capacity of the lung for carbon monoxide; ASA: American Society of Anaesthesiologists; ECOG: Eastern Cooperative Oncology Group. #: n=29; ¶: n=72.