Table 2 Factors associated with HBsAg-positivity in adult women, logistic regression models using weighted and calibrated data, n = 905 (ANRS 12356 AmBASS)

Socio-demographic and socioeconomic characteristics

 Age group (years)

   ≥ 50 (ref.)

1

1

   > 35 – 49

4.27

[1.75; 10.38]

0.005

5.15

[1.93; 13.78]

0.004

  15 – 35

2.52

[1.05; 6.06]

0.041

2.82

[1.09; 7.26]

0.040

 Matrimonial status

  Married in a polygamous union (ref.)

1

  Married in a monogamous union

0.82

[0.42; 1.60]

0.515

  Not married

0.75

[0.41; 1.35]

0.294

 Number of children

  0 (ref.)

1

  1–3

1.66

[0.2; 3.38]

0.140

   ≥ 4

1.32

[0.68; 2.55]

0.371

 Pregnant at the time of the survey

  No (ref.)

1

  Yes

1.04

[0.33; 3.27]

0.944

 Area of residence

  Semi-urban (ref.)

1

  Rural

0.95

[0.52; 1.72]

0.837

 Educational level

  Junior high school or above (ref.)

1

  Primary or below

0.73

[0.33; 1.60]

0.385

  Never attended school

1.10

[0.60; 2.01]

0.720

 Activity

  Inactive (ref.)

1

  Farming and/or non-farming activity

3.05

[0.67; 13.9]

0.131

  Studies/training

2.00

[0.50; 8.05]

0.289

 Household wealth index ^a

  1^st quartile (ref.)

1

  2^nd quartile

1.58

[0.61; 4.13]

0.309

  3^rd quartile

2.08

[0.91; 4.78]

0.077

  4^th quartile

1.40

[0.58; 3.39]

0.417

 Having community health insurance

  Yes (ref.)

1

  No

6.36

[0.77;52.57]

0.079

Hepatitis b status of household members and knowledge on hepatitis B

 Living in a household with at least 2 other HBsAg-positive individuals

  No (ref.)

1

1

  Yes

4.16

[2.27; 7.62]

 < 0.001

5.09

[2.88; 9.02]

 < 0.001

 Do you know someone who had/has a liver disease?

  Yes (ref.)

1

1

  No

2.21

[0.91; 5.38]

0.075

2.23

[0.94; 5.27]

0.065

 Have you ever heard of hepatitis B?

  Yes (ref.)

1

  No

1.58

[0.78; 3.19]

0.176

 Do you think there is a link between liver disease and hepatitis B?

  Yes (ref.)

1

  No

1.65

[0.51; 5.27]

0.357

 Do you know what the modes of Hepatitis B transmission are?

  Sexual transmission

   Correct response (ref.)

1

   Incorrect

2.41

[0.87; 6.66]

0.082

  Contact with blood

   Correct response (ref.)

1

   Incorrect

1.75

[0.77; 3.98]

0.159

  Perinatal transmission

   Correct response (ref.)

1

   Incorrect

2.12

[0.85; 5.30]

0.095

 Do you know if there is a vaccine that protects against hepatitis B?

  Yes (ref.)

1

  No

1.12

[0.46; 2.76]

0.778

 Knowledge score (ranged: 0–5 points) (0.0) ^b

  Good score (3–5 points)

1

  Poor score (0–2 points)

2.02

[0.79; 5.16]

0.125