TABLE 3.

Distribution of results for combinations of two EBV biomarkers for NPC patients and healthy controls

EBV marker and result	No. of sera for indicated antibody, treatment group, and EBV marker
	IgA-EBNA1				IgA-EA-D				IgG-EA-D
	NPC		Healthy		NPC		Healthy		NPC		Healthy
	Positive	Negative	Positive	Negative	Positive	Negative	Positive	Negative	Positive	Negative	Positive	Negative
IgA-VCA
Positive	80	23	15	21	87	16	15	21	92	26	1	35
Negative	20	12	18	76	21	11	12	82	11	6	12	82
IgA-EBNA1
Positive					86	14	9	24	87	31	3	30
Negative					22	13	14	83	13	4	10	87
IgA-EA-D
Positive									95	23	4	19
Negative									13	4	9	98