Characteristics of the population
| Patients n | 331 |
| Age, median (range) years | 68.0 (42.0–87.0) |
| <70 years | 177 (53.5) |
| ≥70 years | 154 (46.5) |
| Sex | |
| Male | 222 (67.1) |
| Female | 109 (32.9) |
| Tobacco | |
| Nonsmoker | 28 (8.5) |
| <10 pack-years | 18 (5.4) |
| 10–30 pack-years | 126 (38.1) |
| >30 pack-years | 159 (48.0) |
Data are presented as n (%), unless otherwise stated.