Breakdown of interstitial lung disease diagnoses and number of patients in each category#
| Known association | |
| Connective tissue disease | 10 (5) |
| Drug side-effects | 8 (4) |
| Occupational cause | 4 (2) |
| Idiopathic interstitial pneumonia | |
| Cryptogenic organising pneumonia | 4 (2) |
| Idiopathic pulmonary fibrosis | 105 (50) |
| Idiopathic nonspecific interstitial pneumonia | 27 (13) |
| Idiopathic pleuroparenchymal fibroelastosis | 2 (1) |
| Granulomatous | |
| Hypersensitivity pneumonitis | 22 (10) |
| Sarcoidosis | 27 (13) |
Data are presented as n (%). #: n=209.