Table 2 Ocurrences of pregnancy outcomes (%) in the study groups and relative risks (OR) compared with the reference group

SGA

Reference

9.29

0

8.15

0.87

0.56–1.34

0.97

0.62–1.52

1–5

9.66

1.04

0.66–1.66

0.97

0.60–1.55

Preterm delivery

Reference

6.51

(< 37 weeks)

0

25.22

4.84

3.57–6.57

4.60

3.35–6.31

1–5

39.58

8.51

6.39–11.35

8.58

6.32–11.64

Low birth weight

Reference

4.73

(< 2500 g)

0

21.85

5.63

4.19–7.57

5.46

3.90–7.65

1–5

33.01

9.86

7.33–13.26

9.18

6.65–12.68

Admission to NICU

Reference

7.76

0

9.26

1.21

0.80–1.83

1.18

0.75–1.86

1–5

8.70

1.13

0.70–1.84

1.14

0.69–1.86

Low Apgar score (< 7) 1 min

Reference

4.83

0

18.89

4.59

3.36–6.26

4.52

3.20–6.38

1–5

25.60

6.78

4.93–9.31

6.90

4.94–9.64

Low Apgar score (< 7) 5 min

Reference

1.82

0

11.11

6.74

4.56–9.98

5.98

3.80–9.40

1–5

14.98

9.50

6.41–14.09

9.70

3.40–14.71

Foetal venous pH < 7.15 at birth

Reference

1.22

0

3.70

3.12

1.64–5.93

1.13

0.28–4.62

1–5

1.93

1.60

0.59–4.33

3.71

1.48–9.28

Caesarean section

Reference

16.22

0

23.33

1.57

1.18–2.09

1.68

1.23–2.29

1–5

21.26

1.39

1.0–1.95

1.50

1.06–2.12

Fetal death

Reference

0.26

0

2.59

5.76

2.50–13.27

5.19

2.04–13.22

1–5

4.83

12.86

6.59–25.07

12.05

5.95–24.4

Neonatal death

Reference

0.25

0

2.59

10.41

4.71–23.01

8.66

3.59–20.86

1–5

2.42

9.68

3.85–24.38

10.03

3.85–26.13