Baseline characteristics of patients with chronic pulmonary diseases and controls included in the study
| Patients | Controls | P value | |
| N | 593 | 593 | |
| Median age, years (IQR) | 68 (58–74) | 62 (57–64) | <0.001 |
| Male gender, n (%) | 283 (47.7) | 193 (32.5) | <0.001 |
| Median time between first and second vaccine dose, days, (IQR) | 23 (22–25) | 30 (29–32) | <0.001 |
| BMI, mean (SD) | 27.2 (6.4) | 25.4 (6.4) | <0.001 |
BMI, body mass index.