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)

		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

RR relative risk, 95% CI 95% confidence interval, PPV positive predictive value, NPV negative predictive value, PLR positive likelihood ratio, NLR negative likelihood ratio