Table 4.

Effect of each variable on the analysis. The baseline included body temperature, antipyretic drug, and antibiotic drug data. “+<variable>” means that the variable was added to the baseline for the analysis and then removed for the next analysis (noncumulative addition).

Variable	Sensitivity	Specificity	AUROCa	Accuracy	NPVb	F1
Baseline	0.6018	0.7187	0.7221	0.6592	0.6351	0.6425
+sex	0.5678	0.7401	0.7087	0.6524	0.6229	0.6245
+weight	0.5734	0.7523	0.7232	0.6619	0.6332	0.6315
+age	0.5634	0.7477	0.7201	0.6539	0.6229	0.6237
+app surveillance	0.8673c	0.7599	0.8808c	0.8146c	0.8467c	0.8264c
+KCDCd surveillance	0.7670	0.7936c	0.8607	0.7800	0.7666	0.7802
+meteorological	0.8127	0.7470	0.8712	0.7802	0.7961	0.7888

^aAUROC: area under the receiver operating characteristic.

^bNPV: negative predictive value.

^cThe highest increase in the value for the corresponding column.

^dKCDC: Korea Center for Disease Control.