Table 5. Comparison between in-house IgG ELISA with FDA approved commercial antibody immunoassay.

	Commercial immunoassay
		Positive	Negative	Total	Sensitivity, % (95% CI)	Specificity, % (95% CI)	Test agreement
In-house ELISA	Positive	13	0	13	100(75.3, 100)	100(80.5, 100)	100
	Negative	0	17	17
	Total	13	17	30

Test agreement was evaluated by Kappa statistics.