Table 3 Socioeconomic factors associated with adolescent pregnancy

Age at the first sexual intercourse (years)

15 ± 1.7

17 ± 3.4

<  0.001*

–

0.018*

0.9 (0.83–0.98)

Age at the first pregnancy (years)

16 ± 1.8

22 ± 5.2

<  0.001*

–

< 0.001*

0.65 (0.6–0.69)

Age at the birth of the first child (years)

17 ± 1.8

22 ± 5.3

<  0.001*

–

c

How many people live in the household?

4 ± 1.5

4 ± 1.3

< 0.001*

–

< 0.001*

0.77 (0.68–0.87)

Family income (Reais)

962 ± 845.2

1134 ± 1047.3

0.001*

0.038*

1 (1–1)

n (%)

n (%)

p_a

OR (95%CI)_a

p_b

OR (95%CI)_b

 White

55 (12,6)

359 (18,9)

0,005^*

0,75 (0,48-1,18)

0,521

0,96 (0,49-1,86)

 Brown

349 (80.4)

1385 (73.2)

1.24 (0.83–1.85)

1.17 (0.63–2.19)

 Black

30 (6.9)

148 (7.8)

Ref.

 Yes

432 (99)

1831 (96.4)

0.014^*

2.59 (0.85–7.91)

c

 No

1 (0.2)

34 (1.7)

0.32 (0.03–3.28)

 Can only sign their name

3 (0.6)

33 (1.7)

Ref.

 No partner

179 (41)

449 (23.6)

< 0.001*

2.24 (1.8–2.8)

< 0.001*

2.26 (1.67–3.07)

 With partner

257 (58.9)

1450 (76.3)

Ref.

 Yes

386 (88.9)

1798 (94.6)

< 0.001*

0.45 (0.32–0.64)

0.011*

0.48 (0.28–0.84)

 None

48 (11)

102 (5.3)

Ref.

 Capital/MRF

190 (43.6)

762 (40)

0.173

1.15 (0.92–1.44)

–

 Countryside

246 (56.4)

1142 (60)

Ref.

 Yes, paid by the company

22 (5)

129 (6.7)

0.001^*

0.69 (0.43–1.09)

1

1.01 (0.43–2.33)

 Yes, paid by the family

18 (4.1)

167 (8.7)

0.43 (0.27–0.7)

1 (0.55–1.8)

 No

395 (90.8)

1602 (84.4)

Ref.

 No

168 (42.6)

726 (42.4)

0.954

1 (0.81–1.23)

–

–

 Yes

226 (57.3)

983 (57.5)

Ref.

 E

372 (87.1)

1407 (75.2)

< 0.001*

2.23 (1.66–2.99)

0.348

1.22 (0.8–1.86)

 D, C, B and A

55 (12.8)

464 (24.7)

Ref.