| IPF | Normal | |
| n | 20 | 10 |
| Age (range) | 70 (52–86) | 45 (34–58) |
| Sex (No of men) | 16 | 4 |
| Smoking status: current/ex/never | 5/22/3 | 3/5/2 |
| Pack years (IQR) | 29 (33) | 0 (16) |
| BAL total cell count ×104/ml (IQR) | 106 (160) | 4.1 (44.5) |
| BAL neutrophil percentage (IQR) | 16.5 (26) | 1.2 (2.5) |
| FVC (IQR) | 69.5 (27.8) | N/A |
| TLco (IQR) | 49.0 (13.0) | N/A |
Data expressed as median (IQR).
BAL, bronchoalveolar lavage; FVC, forced vital capacity (expressed as percentage of normal); IPF, idiopathic pulmonary fibrosis; TLco, carbon monoxide diffusion factor (expressed as percentage of normal).