Table 2.

Sensitivity and specificity of IgM ELISA for dilution 1:80 and 1:160 at different cut-off values

Dilution	Cut-off value	Sensitivity (%)	Specificity (%)	Positive predictive value (%)	Negative predictive value (%)
	0.45	96.15	57.89	75.76	91.67
1:80	0.50	94.87	75.44	84.09	91.49
	0.55	90.38	87.72	86.96	90.97
	0.60	85.26	93.86	95.00	82.31
	0.65	80.13	97.37	97.66	78.17
	0.45	88.46	84.21	88.46	84.21
1:160	0.50	83.33	90.35	92.20	79.84
	0.55	72.44	92.98	93.39	71.14
	0.60	66.67	97.37	97.20	68.10
	0.65	57.05	97.37	96.74	62.36