The DECAF Score
| Variable | Score |
| Dyspnoea | |
| eMRCD 5a | 1 |
| eMRCD 5b | 2 |
| Eosinopenia (<0.05 ×109/l) | 1 |
| Consolidation | 1 |
| Acidaemia (pH <7.3) | 1 |
| Atrial fibrillation | 1 |
| Total DECAF Score | 6 |
DECAF, Dyspnoea, Eosinopenia, Consolidation, Acidaemia and atrial Fibrillation; eMRCD, extended MRC dyspnoea.