Poor prognostic factors.
| Associated malignancy108,109 |
| Anti-SRP antibodies110 |
| Pulmonary involvement (respiratory muscles and/or ILD)48,109,111 |
| Cardiac involvement48,111 |
| Bulbar involvement — dysphagia54 |
| Older age48 |
| Nonwhite race48 |
| Delayed treatment48 |
SRP: signal recognition particle; ILD: interstitial lung disease.