Table 2 Associations with labour and birth outcomes in nulliparous and parous migrant women with and without CBD support.

Births to nulliparous women

 Outcome

  Induction of labour

72

19.0

890

13.8

1.46

1.12–1.91

1.26

0.96–1.65

1.23

0.93–1.61

1.16

0.88–1.55

  Epidural analgesia

107

28.2

3760

39.6

0.60

0.48–0.76

0.61

0.48–0.77

0.61

0.48–0.77

0.64

0.50–0.81

  Nitrous oxide

281

74.1

5069

78.7

0.78

0.61–0.98

0.79

0.62-1.00

0.79

0.62–1.01

0.79

0.62–1.02

  Bath

25

6.6

757

11.8

0.53

0.35–0.80

0.56

0.37–0.85

0.57

0.38–0.87

0.64

0.42–0.98

  Non-instrumental vaginal birth^d

267

70.4

4541

70.5

1.00

0.79–1.25

0.94

0.74–1.19

0.95

0.75–1.21

0.95

0.75–1.21

  Instrumental vaginal¹

34

9.0

596

9.3

1.04

0.73–1.46

1.12

0.79–1.58

1.11

0.79–1.59

0.99

0.70–1.43

  Emergency caesarean

67

17.7

972

15.1

1.21

0.92–1.59

1.20

0.91–1.58

1.17

0.88–1.55

1.21

0.91–1.61

  Perineal injury 3rd and 4th degree

6

1.6

155

2.4

0.65

0.29–1.48

0.73

0.32–1.68

0.74

0.32–1.69

0.59

0.25–1.39

  Apgar score < 7 at 5 minutes

9

2.4

112

1.8

1.37

0.69–2.72

1.28

0.64–2.58

1.26

0.62–2.53

1.26

0.62–2.57

  Hospital stay (mother) after birth > 2 days

206

54.9

3269

50.9

1.18

0.95–1.45

1.12

0.90–1.38

1.11

0.89–1.37

1.09

0.87–1.36

n = 500

n = 10,349

Births to parous women

  Induction of labour

89

17.8

1200

11.6

1.65

1.30–2.09

1.49

1.17–1.90

1.43

1.12–1.83

1.38

1.08–1.76

  Epidural analgesia

39

7.8

1212

11.7

0.64

0.46–0.89

0.63

0.45–0.88

0.64

0.46–0.89

0.80

0.57–1.13

  Nitrous oxide

321

64.2

7026

67.9

0.85

0.70–1.02

0.85

0.70–1.02

0.85

0.70–1.03

0.89

0.73–1.08

  Bath

16

3.2

339

3.3

0.98

0.59–1.63

1.02

0.61–1.71

1.08

0.65–1.82

1.25

0.74–2.11

  Non-instrumental vaginal birth^d

428

85.6

8603

83.1

1.21

0.94–1.56

1.15

0.89–1.49

1.18

0.91–1.53

1.1

0.85–1.44

  Instrumental vaginal^d

12

2.4

189

1.8

1.41

0.80–2.50

1.55

0.87–2.76

1.55

0.87–2.77

1.57

0.87–2.83

  Emergency caesarean

38

7.6

788

7.6

1.00

0.71–1.40

0.98

0.70–1.38

0.94

0.67–1.32

0.96

0.68–1.37

  Perineal injury 3rd and 4th degree

5

1.0

49

0.5

2.12

0.84–5.35

2.08

0.81–5.34

2.19

0.85–5.64

1.96

0.73–5.22

  Apgar score < 7 at 5 minutes

8

1.8

131

1.3

1.28

0.62–2.62

1.39

0.67–2.88

1.22

0.59–2.54

1.15

0.54–2.45

  Hospital stay (mother) after birth > 2 days

105

21.1

2096

20.3

1.06

0.93–1.22

1.03

0.89–1.18

1.01

0.88–1.17

1.19

1.03–1.37