Table 3.

Predictive Power of the SI, rSIG, and NEWS to Predict ESI Levels 1–2

Prediction Tool	Cut-Off	Sens	Spec	PPV	NPV	LR+	LR-	AuROC (95% CI)	P-value
SI	>0.8	37.5	78.9	82.6	32.1	1.78	0.79	0.582 (0.52–0.65)	<0.001
rSIG	<16	42.1	87.7	90.1	36.2	3.43	0.66	0.649 (0.59–0.70)
NEWS	>6	50.3	98.2	98.8	40.9	27.68	0.51	0.743 (0.70–0.79)

Abbreviations: SI, shock index; rSIG, reverse shock index multiplied by Glasgow coma scale; NEWS, national early warning score; ESI, emergency severity index; Sens, sensitivity; Spec, Specificity; PPV, positive predictive value; NPV, negative predictive value; LR+, positive likelihood ratio; LR-, negative likelihood ratio; AuROC, area under the receiver operating characteristic; CI, confidence interval; P-value; probability value.