Numbers and probabilities (a priori probability) of final diagnoses in the group with suspected interstitial lung disease (ILD)
| Diagnosis | All patients | Smokers |
| Sarcoidosis | 239 (33.7) | 19 (19.6) |
| UIP | 112 (15.8) | 16 (16.5) |
| EAA | 66 (9.3) | 4 (4.1) |
| NSIP | 46 (6.5) | 7 (7.2) |
| Tumour | 29 (4.1) | 11 (11.3) |
| Others | 25 (3.5) | 4 (4.1) |
| No fibrosis | 23 (3.2) | 2 (2.1) |
| Connective tissue disease | 18 (2.5) | 1 (1.0) |
| BOOP | 17 (2.4) | |
| Histiocytosis X | 15 (2.1) | 9 (9.3) |
| Alveolar haemorrhage | 8 (1.1) | 1 (1.0) |
| Tuberculosis | 7 (1.0) | 1 (1.0) |
| Pneumoconiosis | 7 (1.0) | 2 (2.1) |
| Drug-induced alveolitis | 5 (0.7) | |
| CEP | 4 (0.6) | 2 (2.1) |
| RBILD | 4 (0.6) | 1 (1.0) |
| Wegener's granulomatosis | 3 (0.4) | |
| LIP | 3 (0.4) | |
| Pneumocystis carinii | 1 (0.1) | 1 (1.0) |
| Alveolar proteinosis | 1 (0.1) | |
| DIP | 1 (0.1) | |
| Inflammatory disease | 76 (10.7) | 15 (16.4) |
Data are presented as n (%). Only smokers with reliable information on current smoking at the time of diagnosis were analysed separately. UIP: usual interstitial pneumonia; EAA: extrinsic allergic alveolitis; NSIP: nonspecific interstitial pneumonia; others: e.g. obstructive sleep apnoea and cardiac failure; no fibrosis: neither ILD nor inflammatory disease nor tumour (e.g. persistent cough of unknown origin, suspected aspiration, reflux); BOOP: bronchiolitis obliterans organising pneumonia; CEP: chronic eosinophilic pneumonia; RBILD: respiratory bronchiolitis-associated interstitial lung disease; LIP: lymphocytic interstitial pneumonia; DIP: desquamative interstitial pneumonia