| Characteristics |
| Number (%) |
| Gender | Male | 349 (86.2) |
| Female | 56 (13.8) | |
| Age | <70 years | 333 (82.2) |
| >70 years | 72 (17.8) | |
| Toxic habits | Smoking | 316 (78) |
| Alcoholism | 52 (12.8) | |
| Cannabism | 33 (8.1) | |
| Professional exposure | 17 (4.2) | |
| Clinical signs | Cough | 166 (40.9) |
| Hemoptysis | 134 (33.1) |