| Diagnosis | No of cases (%) |
| Usual interstitial pneumonitis/cryptogenic fibrosing alveolitis | 78 (34) |
| Non-specific inflammation | 25 (11) |
| Organising pneumonia | 22 (10) |
| Sarcoidosis | 19 (8.4) |
| Carcinoma | 14 (6.3) |
| RB-ILD | 12 (5.4) |
| DIP | 10 (4.5) |
| Hypersensitivity pneumonitis | 9 (4) |
| LAM/histiocytosis X | 8 (3.6) |
| Vasculitis/connective tissue disease | 5 (2.2) |
| Emphysema | 4 (1.7) |
| Tuberculosis | 2 (0.9) |
| Other | 16 (7.1) |