Table 4.

Results of the ROC curve

Variable	AUC	Cut-off value	Youden index	Sensitivity	Specificity	95% CI	P
Age (months)	0.656	83.50	0.243	0.542	0.701	(0.594–0.718)	0.000
Fever days	0.770	10.50	0.431	0.746	0.685	(0.715–0.825)	0.000
ALT (U/l)	0.644	15.25	0.273	0.716	0.557	(0.580–0.707)	0.000
IgM (g/l)	0.752	1.46	0.407	0.740	0.667	(0.692–0.812)	0.000
Complement C3 (g/l)	0.577	1.47	0.144	0.423	0.721	(0.507–0.647)	0.036
Fbg (g/l)	0.668	3.93	0.292	0.534	0.758	(0.603–0.733)	0.000
Dyspnea	0.586	–	0.171	0.220	0.951	(0.518–0.653)	0.012
Needing FBAL	0.668	–	0.336	0.966	0.370	(0.608–0.728)	0.000
Joint variable	0.883	–	0.646	0.814	0.832	(0.841–0.924)	0.000