Multivariate Cox regression analysis for mortality
| Variable | Adjusted HR (95% CI) | p-value |
| Age per year | 1.02 (1.00–1.04) | 0.046 |
| FVC per % predicted | 0.99 (0.97–1.00) | 0.006 |
| DLCO per % predicted | 0.97 (0.96–0.98) | <0.0001 |
| >6 months antifibrotic treatment | 0.67 (0.43–1.05) | 0.078 |
HR: hazard ratio; FVC: forced vital capacity; DLCO: diffusing capacity of the lung for carbon monoxide. Bold indicates statistically significant p-values.