Basic demographic data and pre-existing comorbidities (sd=standard deviation)
| Number of patients | 78 |
| Male (%) | 56.4 |
| Caucasian (%) | 100 |
| Age (years±sd) | 65±14 |
| BMI (kg·m−2±sd) | 29.4±4.9 |
| Active smoker | 16.7% |
| Former Smoker | 46.2% |
| Non smoker | 37.2% |
| Hypertension | 70.5% |
| Diabetes | 19.2% |
| Coronary artery disease | 21.8% |
| Asthma | 17.9% |
| COPD | 10.3% |
| Malignancy | 21.8% |