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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

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

Variable Testeda Positive for anti-HEV, N (%) Pvalueb OR (95% CI)
Educational levelc     
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)
  1. aThe total no. of participants shown is <2,450, owing to deficient reporting.
  2. bIf P < 0.05, the differences of seroprevalence among compared groups are statistically significant.
  3. cThe seovprevalence of individuals over the age of 10 years old were used for this data.