TABLE 3.

Seroprevalence of IgG and IgM anti-HEV in different age groups in healthy controls^a

Age (y)	No. of patients	No. (%) of patients with seroprevalence for:
		IgG anti-HEVb	IgM anti-HEV
<20	131	3 (2.3)	7 (5.3)
20–39	208	15 (7.2)	11 (5.3)
40–59	164	19 (11.6)	6 (3.7)
≥60	168	37 (22.0)	1 (0.6)
Total	671	74 (11.0)	25 (3.7)

^aA total of 271 serum samples collected at Taipei VGH were negative for HEV RNA. Another 400 serum samples collected at the other two medical centers were directly used for a seroprevalence study without determination of HEV RNA. 

^bP value, <0.01.