Table 5.
The rate of events predicted by different score thresholds for NEWS (e.g. 4) and log EWS (e.g. 0.003), with accompanying sensitivity and specificity, when observations are limited to the preceding 6 h, 12 h or 24 h. See online Supporting Information Appendix for additional information
| Observation period | Event rate | Sensitivity | Specificity | |||
|---|---|---|---|---|---|---|
| NEWS | logEWS | NEWS | logEWS | NEWS | logEWS | |
| 6 h: score threshold | ||||||
| 4 (0.003)a | 18% | 20% | 67% | 74% | 83% | 80% |
| 5 (0.010) | 9% | 9% | 48% | 52% | 92% | 92% |
| 7 (0.017) | 2% | 2% | 26% | 34% | 98% | 98% |
| 12 h: score threshold | ||||||
| 4 (0.005)a | 18% | 21% | 61% | 69% | 83% | 80% |
| 5 (0.010) | 9% | 9% | 48% | 52% | 92% | 92% |
| 7 (0.029) | 2% | 2% | 24% | 28% | 98% | 98% |
| 24 h: score threshold | ||||||
| 3 (0.007)a | 33% | 29% | 71% | 71% | 67% | 72% |
| 5 (0.018) | 9% | 9% | 40% | 43% | 92% | 92% |
| 7 (0.043) | 2% | 2% | 18% | 21% | 98% | 98% |
NEWS, National Early Warning Score; EWS, early warning scores.
a
Optimal Youden index.