Table 1 Maternal, gestational, and birth data according to the occurrences of congenital anomalies in live-born babies. Mato Grosso do Sul, Brazil (2015–2018)

Age (mother)

 up to 19 years

212

31,579

1.07 (0.92, 1.25)

 20–34 years

752

119,788

Reference

 35–39 years

122

16,584

1.17 (0.97, 1.42)

  ≥ 40 years

30

3702

1.29 (0.89, 1.86)

Ethnicity

 European

367

61,406

0.89 (0.78, 1.01)

 Non-European

678

101,042

Reference

 Indigenous

71

8015

1.32 (1.03, 1.69)

Prenatal care

 No

27

2386

1.76 (1.20, 2.58)

 Yes

1089

168,907

Reference

Schooling

 No

7

197

5.56 (2.61, 11.84)

 Yes

1109

166,902

Reference

Pregnancy (type)

 Single

1.077

168,232

Reference

 Multiple

39

3393

1.80 (1.30, 2.48)

Gestational age (weeks)

  < 37 weeks

294

19,867

2.74 (2.39, 3.13)

 37–41 weeks

791

146,266

Reference

  ≥ 42

31

4496

1.27 (0.89, 1.83)