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Types of collagen disease and the distribution of ILD patterns
| Collagen Disease | ILD pattern on CT | The number of cases | |
|---|---|---|---|
| UIP pattern | NSIP pattern | ||
| Rheumatoid arthritis (RA) | 9 | 4 | 13 |
| Sjögren syndrome (SjS) | 1 | 0 | 1 |
| Dermatomyositis (DM) | 0 | 1 | 1 |
| Systemic lupus erythematosus (SLE) | 0 | 1 | 1 |
ILD interstitial lung disease, CT computed tomography, UIP usual interstitial pneumonia, NSIP non-specific interstitial pneumonia
