Predictors of fibrosing alveolitis (FA) on HRCT scan
| Feature | FA (n=28) | No FA (n=122) | Sensitivity | Positive predictive value |
| NYHA grade III | 5 | 8 | 18% | 38% |
| Bibasal crackles | 15 | 11 | 54% | 58% |
| Tlco<75% predicted | 23 | 63 | 82% | 27% |
| RV <80% predicted | 10 | 33 | 36% | 23% |
| Restrictive PFT | 4 | 5 | 14% | 44% |
| CXR-FA | 4 | 6 | 14% | 40% |
NYHA = New York Health Association grading for dyspnoea; Tlco = carbon monoxide transfer factor; RV = residual volume; PFT = pulmonary function test; CXR = chest radiograph.