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)

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