Baseline patient characteristics (n=142)
| Characteristic | Mean (SD) or % |
| Age | 67.0 (9.0) |
| Male gender | 74% |
| History of smoking | 69% |
| Currently smoking | 1.4% |
| Biopsy proven disease | 56% |
| Current or previous prednisone use | 35% |
| Long-term oxygen therapy | 19% |
| FVC, litres | 2.70 (0.78) |
| FVC, % predicted | 67.6 (16.1) |
| DLCO (ml/min/mm Hg) | 12.4 (4.2) |
| DLCO, % predicted | 48.5 (15.1) |
DLCO, diffusion capacity for carbon monoxide; FVC, forced vital capacity.