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Table 3 Prevalence of HEV antibodies according to individual and household-level risk factors

From: Hepatitis A and E seroprevalence and associated risk factors: a community-based cross-sectional survey in rural Amazonia

Variable No. of subjectsa HEV antibody prevalence (%) Odds ratio (95% CI) P
Age (years) <0.008b
  5-10 66 9.1 1.00  
  11-20 107 4.7 0.49 (0.11-2.03)  
  21-30 67 19.4 2.41 (0.78-8.23)  
  31-50 101 17.8 2.17 (0.76-7.05)  
  >50 47 17.0 2.05 (0.57-7.72)  
Sex     
  Female 184 14.1 1.23 (0.65-2.34) 0.290
  Male 204 11.8 1.00  
Past history of hepatitis
  No 337 13.3 1.00 0.631
  Yes 52 9.8 0.71 (0.21-1.91)  
Education of household head (years of schooling) 0.046b
  0 81 18.5 2.73 (0.80-11.92)  
  1-4 174 13.2 1.83 (0.58-7.61)  
  5-8 81 9.9 1.32 (0.33-6.29)  
  >8 52 7.7 1.00  
Wealth index (quartiles)c
  1 (poorest) 109 12.8 1.60 (0.57-4.92) 0.497b
  2 98 14.3 1.81 (0.64-5.57)  
  3 98 15.3 1.96 (0.70-5.99)  
  4 (least poor) 83 8.4 1.00  
Water source
  Well 366 13.4 1.00 0.382
  River/stream 22 4.5 0.31 (0.01-2.01)  
Drinking water filtrated or chlorinated
  Yes 302 13.2 1.00 0.961
  No 72 13.9 1.06 (0.45-2.30)  
Crowding (number of inhabitants/room)
  <1 161 13.7 1.00 0.673b
  1-1.9 181 12.1 0.87 (0.44-1.73)  
  2-3 22 18.2 1.40 (0.32-4.83)  
  >3 24 8.3 0.57 (0.06-2.63)  
  1. Ramal do Granada, Brazil, 2004.
  2. aNumber of individuals differ for some variables, because of missing values.
  3. b Pvalues forχ2 tests for linear trend; all other P values are for standard χ2 tests.
  4. cWealth index derived from information on household assets and other socioeconomic data; see the “Subjects, Methods” section.
  5. 95% CI, 95% confidence interval.