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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.