Table 4. Performance, sensitivity, specificity, likelihood ratios and predictive values of PMEWS, CURB-65 and STSS scores.

	AUC	95% CI	Sensitivity (%)	Specificity (%)	+LR	−LR	PPV	NPV	P
Mortality
PMEWS ≥ 3	0.968	0.912-0.993	100	81.91	5.53	0.0	26.08	100.0	< 0.001*
CURB-65 ≥ 1	0.942	0.877-0.979	83.33	90.43	8.70	0.18	35.72	98.83	< 0.001*
STSS ≥ 1	0.962	0.903-0.990	83.33	93.62	13.06	0.18	45.46	98.87	< 0.001*
ICU admission
PMEWS ≥ 5	0.941	0.875-0.978	80	95.56	18	0.21	66.68	97.72	< 0.001*
CURB-65 ≥ 1	0.898	0.821-0.949	80	93.33	12	0.21	57.13	97.67	< 0.001*
STSS ≥ 1	0.878	0.798-0.935	90	72.22	3.24	0.14	26.46	98.48	< 0.001*
Need for MV
PMEWS ≥ 5	0.854	0.769-0.917	60	96.47	17	0.41	74.99	93.18	< 0.001*
CURB-65 ≥ 1	0.867	0.785-0.927	66.67	95.29	14.17	0.35	71.4	94.18	< 0.001*
STSS ≥ 1	0.820	0.731-0.890	80	74.12	3.09	0.27	35.29	95.45	< 0.001*

PMEWS = Pandemic Medical Early Warning Score; CURB-65 = Confusion, Uremia, Respiratory rate, Blood pressure and age ≥ 65; STSS = Simple Triage Scoring System; AUC = area under the curve; CI = confidence interval; +LR = positive likelihood ratio; -LR = negative likelihood ratio; PPV = positive predictive value; NPV = negative predictive value; ICU = intensive care unit; MV = mechanical ventilation.

^*P < 0.05 was considered significant.