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Table 3 Final adjusted multinomial multivariate analysis predicting mistimed and unwanted pregnancy. Birth in Brazil, 2011/2012

From: Factors associated with unintended pregnancy in Brazil: cross-sectional results from the Birth in Brazil National Survey, 2011/2012

Variables

Mistimed (a)

Unwanted (a)

OR

95 % CI

OR

95 % CI

Maternal Age (years)

  < 20

1.89

1.68–2.14

2.42

2.10–2.79

 35 and over

0.43

0.37–0.51

0.75

0.64–0.88

 20 to 34

1

 

1

 

Schooling level

  ≤ 7 years

0.72

0.63–0.83

1.04

0.89–1.21

 8 to 11 years

0.99

0.87–1.12

1.38

1.21–1.58

 12 or more years

1

 

1

 

Skin color

 White

1

 

1

 

 Black

1.10

0.91–1.32

1.34

1.16–1.56

 Brown

1.15

1.04–1.27

1.20

1.08–1.34

 Yellow

1.56

1.05–2.32

1.39

0.93–2.08

Marital status

 With partner

1

 

1

 

 Without partner

2.32

1.99–2.71

4.86

4.12–5.74

Has paid work

 Yes

1

 

1

 

 No

1.15

1.04–1.27

1.14

1.04–1.25

Alcohol use

 No

1

 

1

 

 Yes, but with no alcoholism risk

1.12

0.90–1.39

1.21

0.96–1.53

 Yes, with alcoholism risk

1.25

1.04–1.50

1.36

1.17–1.58

Tobacco use

 No

1

   

 Yes

0.87

0.73–1.04

1.23

1.06–1.43

Parity

 Primiparous

1

   

 1

1.30

1.16–1.46

2.49

2.15–2.88

 2

1.55

1.34–1.80

6.96

5.81–8.33

 3 and more

2.01

1.63–2.47

14.00

11.29–17.35

Adverse obstetric outcomes in previous pregnancyb

 Neonatal death

  No

1

 

1

 

  Yes

0.61

0.44–0.85

0.44

0.34–0.57

 Preterm birth (GA < 37 weeks)

  No

1

 

1

 

  Yes

1.16

0.91–1.48

1.40

1.16–1.67

 Low birth weight (BW < 2500 g)

  No

1

 

1

 

  Yes

0.92

0.74–1.14

1.14

0.97–1.35

 Maternal complicationsc

  No

1

 

1

 

  Yes

0.99

0.84–1.17

1.19

1.02–1.40

  1. GA gestational age, BW birth weigh
  2. (a) Reference category: intended pregnancy
  3. bExcluding primiparous women
  4. cComplications in previous pregnancy (eclampsia, high blood pressure, uterine rupture or diabetes)