Table 4.

Area under the curve (AUC) of receiver operating curve (ROC) characteristic plot analysis.

Parameter	AUC	95% CI*	P-value	Optimal cut off	Sensitivity	Specificity
Combined Score	0.86	0.81–0.90	-	< 2	78.0	78.8
Temperature	0.74	0.63–0.78	<0.0001	> 39.4	48.1	84.4
No sputum	0.68	0.61–0.74	<0.0001	-	-	-
Sodium	0.71	0.63–0.78	<0.0001	< 133	64.6	70.8
Lactate dehydrogenase	0.62	0.53–0.71	<0.0001	> 225	67.1	58.1
C-reactive protein	0.76	0.70–0.82	<0.0001	> 187	71.6	64.7
Platelet counts	0.71	0.64–0.78	<0.0001	< 171	45.7	83.6

*CI denotes confidence interval;