Hepatitis E Virus (HEV) Seroprevalence in the general population of the Republic of Korea in 2007–2009: a nationwide cross-sectional study

Table 2 Frequency of anti-HEV IgG EIA reactivity associated with educational level, occupation and region of the participants in the Korea National Health and Nutrition Examination Survey, 2007–2009

Variable	Tested^a	Positive for anti-HEV, N (%)	Pvalue^b	OR (95% CI)
Educational level^c
Elementary school or below	132	27 (20.5)	<.0001	1.0
Middle school graduate	152	23 (15.1)		0.7 (0.4-1.3)
High school graduate	621	56 (9.0)		0.4 (0.2-0.6)
University graduate	473	31 (6.6)		0.3 (0.2-0.5)
Occupation
Managers, Professionals	295	19 (6.4)	<.0001	1.0
Clerks	234	14 (6.0)		0.9 (0.5-1.9)
Service provider and Seller	357	26 (7.3)		1.1 (0.6-2.1)
Skilled Agricultural, Forestry and Fishery Workers	48	15 (31.3)		6.6 (3.1-14.2)
Equipment, Machine Operators and Manufacturing Workers	230	20 (8.7)		1.4 (0.7-2.7)
Elementary Workers	151	20 (13.3)		2.2 (1.1-4.3)
Unemployed (housewife, student, etc.)	819	29 (3.5)		0.5 (0.3-0.9)
Residence
Urban area	1,937	90 (4.7)	<.0001	1.0
Rural area	513	54 (10.5)		0.4 (0.3-0.6)
Region of residence
Coastal area	1,064	90 (8.5)	<.0001	1.0
Inland area	1,386	54 (3.9)		2.4 (1.7-3.4)

^aThe total no. of participants shown is <2,450, owing to deficient reporting.
^bIf P < 0.05, the differences of seroprevalence among compared groups are statistically significant.
^cThe seovprevalence of individuals over the age of 10 years old were used for this data.

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