Table 3.

Median distance from home address to nearest pig farm by anti-hepatitis E virus IgG ratio

	Positive or borderline anti-HEV IgG ratioa			Negative anti-HEV IgG ratiob
Age group (years)	n	Median distance (m)	Range in distance (m)c	n	Median distance (m)	Range in distance (m)c	P-value
20–30	5	689	[469–850]	45	652	[489–843]	1.00
30–40	27	751	[373–1102]	152	581	[440–872]	0.16
40–50	83	702	[416–965]	349	665	[441–900]	0.68
50–60	166	701	[498–955]	495	674	[455–901]	0.28
60–70	352	748	[517–970]	586	686	[430–938]	0.02
> = 70	62	794	[539–1041]	100	672	[528–1004]	0.36
Total	695	730	[509–969]	1727	663	[447–916]	0.001

^aAnti-HEV IgG ratio > =0.90

^bAnti-HEV IgG ratio <0.90

^cRange from the 25th to the 75th percentile of the distance from home address to nearest pig farm