Patient characteristics of human lung tissue samples stained for interleukin (IL)-11 and IL-11 receptor
| Patient group | Sex M/F n | Age, median (range) | Smoking status, never/ex/current n | Pack-years, median (range) | Years since smoking cessation, median (range) | FEV1/FVC (best), median (range) | FEV1 (% of predicted pre-BD), median (range) |
| Control | 3/6 | 57 (43–62) | 0/9/0 | Ex: 15 (1.5–25) 3 unknown | Ex: 2 (1–17) 1 unknown | 76 (69–86.6) | 103.6 (85–127) 1 unknown |
| IPF | 9/3 | 57 (37–67) | 5/6/1 | Ex: 26 (6–40) 1 unknown Current: unknown | Ex: 16 (2–33) | 87.9 (67.5–100) | 49.4 (18–74.5) 4 unknown |
FEV1: forced expiratory volume in 1 s; FVC: forced vital capacity; BD: bronchodilator; IPF: idiopathic pulmonary fibrosis.