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Table 3 Univariate and multivariable logistic regression on factors associated with performing one anti-HIV test, Brazil, 2011-2012

From: Prenatal testing and prevalence of HIV infection during pregnancy: data from the “Birth in Brazil” study, a national hospital-based study

Maternal and prenatal care characteristics n1 One anti-HIV test performed during prenatal care (%) Univariate analysis Multivariable analysis2
  OR3 95% CI4 p OR3 95% CI4 p
Region of residence         
Southeast 7.783 88.2 1    1   
North 1.439 69.9 0.31 0.19-0.50 <0.001 0.47 0.30-0.76 <0.001
Northeast 4.616 68.4 0.29 0.21-0.40 0.38 0.28-0.52
South 2.365 92.9 1.75 1.21-2.55 1.77 1.20-2.59
Midwest 694 83.2 0.67 0.42-1.06   0.79 0.53-1.18  
Maternal age         
12 to 19 years 3.364 75.2 1   <0.001 1   
20 to 34 years 11.894 83.0 1.61 1.40-1.85 1.12 0.95-1.31 0.033
35 and over 1.633 85.8 2.00 1.64-2.46 1.33 1.07-1.64
Schooling level (years)         
11 or more 7.658 88.2 1    1   
8 to 10 4.481 80.7 0.56 0.49-0.65 <0.001 0,78 0.68-0.90 <0.001
0 to 7 4.669 72.3 0.35 0.30-0.41 0,64 0.54-0.76
Skin color 5         
White 5.634 88.6 1    1   
Mixed 9.520 78.3 0.43 0.34- 0.55 <0.001 0.77 0.67-0.90 0.001
Black 1.478 77.1 0.46 0.39- 0.53 0.73 0.57-0.94
Conjugal situation         
With partner 13.724 82.4 1    1   
Without partner 3.155 78.7 0.79 0.68-0.91 0.001 0,93 0.79-1.09 0.345
Prenatal service         
Public 13.413 79.3 1   <0.001 1   
Private 3.462 91.2 2.49 2.02-3.07 1.47 1.17-1.86 0.001
Start of prenatal care         
>28th week 747 59.3 1    1   
13th to 28th weeks 7.079 77.6 2.43 1.91-3.09 <0.001 1.88 1.39-2.54 <0.001
Up to 12th week 9.020 87.0 4.68 3.66-5.99 2.34 1.70-3.21
Adequate number of consultations 6         
No 4.756 66.7 1   <0.001 1   
Yes 12.141 87.5 3.45 2.99-3.99 2.17 1.87-2.52 <0.001
  1. 1Only women who attended antenatal care; 2All the analyses were adjusted for the following variables: region of residence, age, schooling level, skin color, conjugal situation, type of prenatal service, time when prenatal care started and adequacy of number of consultations for the gestational age; 3OR = odds ratio; 4CI = confidence interval; 5Pregnant women with East Asian or indigenous skin color were excluded from this analysis; 6Minimum of six consultations for a term pregnancy, adjusted for the gestational age at birth. Totals for these variables vary because of missing values.