Table 3 Binomial logistic regression models for the final analysis of risk factors associate for seropositivity of anti-HIV antibodies in 878 pregnant women in Luanda province, Angola

Age range (Ref =  ≤ 29 years old)

 ≥ 30 years old

1. 2048 (0.6750- 2.1234)

0.522

Education (Ref = High (high school or higher education)

 Low (up to elementary school)

1.2214 (0.8233–1.8044)

1.1825 (0.7948–1.7512)

Occupation (Ref = Homemakers)

 Student

1.0117 (0.5537–1.8451)

0.9545 (0.5183–1.7537)

 Public function

1.1345 (0.6660–1.9636)

1.1068 (0.6484–1.9186)

 Street vendor, store and catering

1.2068 (0.6829–2.1486)

1.1436 (0.6441–2.0444)

Marital status (Ref = Single)

 Married

1.1466 (0.7566–1.7165)

1.1711 (0.7717–1.7561)

Gestational age

 Gestational age (Ref = 1st trimester)

  2nd and 3rd trimester

0.9981 (0.6615–1.5299)

0.9824 (0.6499–1.5085)

 Number of births (Ref = 0)

  1

1.0794 (0.6056–1.9370)

1.2035 (0.6655–2.1934)

  2 or 3

1.5646 (0.9625–2.6202)

1.8608 (1.0549–3.3728)

 Spontaneous abortion (Ref = No)

  Yes

0.6153 (0.1823–1.5602)

0.6338 (0.1868–1.6212)

 History of abortion (Ref = No)

  Yes

0.9155 (0.6208–1.3525)

0.8785 (0.5401–1.4418)

 Access to basic sanitation (Ref = Yes)

  No

0.8791 (0.5797–1.3154)

0.8643 (0.5691–1.2948)

 Recently needle-stick injury or sharp objects (Ref = No)

  Yes

0.8750 (0.2048–2.5770)

0.8955 (0.2092–2.6458)

 Residence (Ref = Luanda)

  Belas

0.6324 (0.3152–1.174)

0.6259 (0.3115–1.1638)

  Cacuaco

0.3485 (0.0830–0.9869)

0.3598 (0.0856–1.0219)

  Viana

0.9647 (0.5973–1.5284)

0.9834 (0.6081–1.5606)