Clinical features of the patients with progressive FA
| Progressive (10) | Stable (15) | χ2 | |
|---|---|---|---|
| NYHA, New York Heart Association grading for dyspnoea; RF, rheumatoid factor; CXR, chest radiograph; FA, fibrosing alveolitis. | |||
| Men | 4 | 3 | 0.38 |
| Smokers | 6 | 5 | 0.24 |
| Receiving prednisolone | 3 | 5 | 1 |
| Rheumatoid nodules | 6 | 8 | 1 |
| NYHA III | 3 | 2 | 0.36 |
| Finger clubbing | 3 | 1 | 0.27 |
| Bibasal crackles | 5 | 8 | 0.04 |
| RF positive | 9 | 13 | 1 |
| Coexistent emphysematous bullae on HRCT | 5 | 5 | 0.44 |
| CXR characteristic of FA | 1 | 2 | 0.54 |