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Table 3 Sensitivity and specificity for 1-day and 30-day mortality at the cut-off high and medium risks categorized according to the prehospital National Early Warning Score (NEWS)

From: Does the prehospital National Early Warning Score predict the short-term mortality of unselected emergency patients?

   NEWS class
  High Medium
Missions, n 718 2550
1-day mortality Sensitivity (95% CI) 0.801 (0.737–0.855) 0.890 (0.837–0.931)
Specificity (95% CI) 0.954 (0.950–0.958) 0.806 (0.798–0.813)
PPV 0.213 0.067
NPV 0.997 0.998
PLR 17.36 4.58
NLR 0.21 0.14
30-day mortality Sensitivity (95% CI) 0.424 (0.383–0.466) 0.630 (0.588–0.670)
Specificity (95% CI) 0.960 (0.956–0.963) 0.815 (0.808–0.822)
PPV 0.332 0.138
NPV 0.972 0.979
PLR 10.49 3.40
NLR 0.60 0.46
  1. RR relative risk, 95% CI 95% confidence interval, PPV positive predictive value, NPV negative predictive value, PLR positive likelihood ratio, NLR negative likelihood ratio