Table 2. Clinical data of patients.
| Variable | COVID19 | Surgical controls |
| Number | 19 | 79 |
| Gender (F/M) | 5/14 | 35/64 |
| Age (years) | 70±9 | 68±9 |
| Current smoking (yes/no) | 3/16 | 23/56 |
| COVID19 mild/severe | 11/8 | - |
| Pre-COVID19 lung fibrosis diagnosed by molecular imaging (yes/no) | 0/19 | - |
| Post-surgery lung fibrosis diagnosed by histopathology (yes/no) | 11/8 | 15/64 |
| Pulmonary Hypertension (yes/no) | 0/19 | 1/78 |
| Concomitant diseases (C/R/D) |
6/3/2 | 21/24/11 |
| CT scan with ground opacity (yes/no) | 7/12 | - |
| CT scan pulmonary effusion | 13/6 | - |
| Pulmonary function test (positive/negative) | 13/6 | - |
| Respiratory bronchiolitis | 5/14 | 28/51 |
| Treatment with immunosuppressants or immunomodulators (yes/no) | 5/14 | 6/73 |
Patient demographic and clinical characteristics are presented as mean ± standard deviation. F, female; M, male; C, cardiovascular; R, Respiratory; D, diabetes, - not performed.