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Table 1 Seroprevalence of antibodies and known risk factors for hepatitis A virus (HAV) in a Madagascan population aged between two and 24 years old.

From: Age-specific seroprevalence of hepatitis A in Antananarivo (Madagascar)

Variable Total, no. (%) HAV + no. (%) Odds ratio (95% CI)* Adjusted Odds Ratio (95% CI)*
Sex         
   Male 406 (43.8) 370 (91.1) 1    
   Female 520 (56.2) 484 (93.1) 1.3 (0.8 – 2.1)   
Age group         
   [2–5] years 48 (5.2) 31 (64.6) 1   1  
   [5–10] years 203 (21.9) 179 (88.2) 4.1 (1.9 – 8.4) 4.7 (2.1 – 10.8)
   [10–15] years 248 (26.8) 233 (94.0) 8.5 (3.8 – 18.7) 11.7 (4.8 – 28.4)
   [15–20] years 208 (22.5) 197 (94.7) 9.2 (4.2 – 22.9) 15.1 (5.8 – 38.9)
   [20–25] years 219 (23.6) 214 (97.7) 23.5 (8.1 – 68.2) 37.7 (11.8 – 120.6)
Occupation         
   Professional 110 (12.1) 93 (84.5) 1   1  
   Manual Workers 806 (87.9) 751 (93.2) 2.5 (1.4 – 4.5) 2.0 (1.0 – 4.0)
Area of residence         
   Firaisana I 220 (23.8) 204 (92.7) 3.1 (1.5 – 6.1)   
   Firaisana II 131 (14.1) 120 (91.6) 2.6 (1.2 – 5.7)   
   Firaisana III 109 (11.8) 88 (80.7) 1    
   Firaisana IV 171 (18.5) 163 (95.3) 4.9 (2.1 – 11.4)   
   Firaisana V 210 (22.7) 199 (94.8) 4.3 (1.9 – 9.3)   
   Firaisana VI 85 (9.2) 94,1 (94.1) 3.8 (1.4 – 10.6)   
Housing         
   Cooking method         
Electric, gas cooker 188 (20.4) 157 (83.5) 1   1  
Wood, Charcoal 732 (79.6) 692 (94.5) 3.4 (2.1 – 5.8) 2.6 (1.4 – 4.8)
   Shower unit         
Yes 696 (75.2) 628 (90.2) 1   1  
No 230 (24.8) 226 (98.3) 6.3 (2.2 – 20.0) 5.0 (1.7 – 14.3)
   Floor         
Tiles, Parquet 220 (23.9) 190 (86.4) 1   1  
Wood, Soil, Cement 698 (76.1) 657 (94.1) 2.6 (1.5 – 4.2) 2.0 (1.1 – 3.6)
Water supply         
   Taps, Bottle 362 (39.1) 318 (87.6) 1    
   Communal Fountain 503 (54.3) 480 (95.4) 2.8 (1.7 – 4.8)   
   River, Well 61 (6.6) 50 (92.6) 1.5 (0.6 – 4.5)   
  1. * CI = confidence interval; 1 = reference.