Indices that comprise news and DECAF scores, and rates of missing data in each cohort
| Derivation cohort | Validation cohort | |
| n=920 | n=1725 | |
| NEWS and NEWS2 | ||
| Respiratory rate | 0.33% | 1.8% |
| Oxygen saturation | 0% | 1.8% |
| Supplemental oxygen | 1.5% | 0% |
| Systolic blood pressure | 0% | 1.7% |
| Pulse | 0% | 1.5% |
| Level of consciousness | 0% | 1.8% |
| Confusion (NEWS2 only) | 0% | 2.6% |
| Temperature | 0.54% | 2.6% |
| DECAF score | ||
| eMRCD score | 0% | 0% |
| Eosinopenia | 0% | 0% |
| Chest X-ray consolidation | 0% | 0% |
| Acidaemia (pH <7.3) | 0%* | 0%* |
| Atrial fibrillation | 0% | 0% |
*In patients without an arterial blood gas, it was assumed that none had an acidaemia of <7.30 provided oxygen saturations were 93% or more while breathing room air. This was based on data from the derivation cohort: of 118 patients meeting these criteria, none had an arterial pH of <7.30.