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Table 2 Migration related factors and their association with stillbirth in migrant women giving birth in Norway, 1990–2013

From: Stillbirth in relation to maternal country of birth and other migration related factors: a population-based study in Norway

 

Primiparous

Multiparous

n

Stillbirths

(%)

Crude OR (95% CI)

Adjusteda OR (95% CI)

n

Stillbirths

(%)

Crude OR (95% CI)

Adjustedb OR (95% CI)

Paternal origin

 Foreign-born (ref)

47,109

233

(0.5)

1.00

1.00

73,487

313

(0.4)

1.00

1.00

 Norwegian-born

30,175

119

(0.4)

0.80 (0.63 to 1.00)

0.73 (0.58 to 0.93)

31,643

106

(0.3)

0.79 (0.63 to 0.98)

0.83 (0.65 to 1.05)

 Missing c

4029

90

(2.2)

4.60 (3.59 to 5.89)

6.29 (4.64 to 8.51)

12,077

247

(2.0)

4.88 (4.12 to 5.79)

5.72 (4.70 to 6.96)

Reason for immigration d

 Nordic migrants (ref)

 

56

(0.6)

1.00

1.00

9145

37

(0.4)

1.00

1.00

 Work/Education

13,410

46

(0.3)

0.54 (0.36 to 0.80)

0.58 (0.39 to 0.88)

9057

38

(0.4)

1.04 (0.66 to 1.64)

1.21 (0.76 to 1.92)

 Family reunion or establishment

38,083

196

(0.5)

0.81 (0.60 to 1.09)

0.76 (0.55 to 1.06)

53,209

281

(0.5)

1.31 (0.92 to 1.86)

1.22 (0.85 to 1.74)

 Refuge

9467

62

(0.7)

1.03 (0.71 to 1.48)

0.92 (0.62 to 1.37)

20,623

138

(0.7)

1.66 (1.14 to 2.41)

1.41 (0.95 to 2.11)

Length of residence

 < 2 years (ref)

30,801

148

(0.5)

1.00

1.00

18,029

99

(0.5)

1.00

1.00

 2–5 years

28,095

158

(0.6)

1.17 (0.93 to 1.47)

1.20 (0.94 to 1.53)

42,549

221

(0.5)

0.95 (0.75 to 1.20)

0.97 (0.76 to 1.24)

 6–9 years

10,299

64

(0.6)

1.30 (0.96 to 1.75)

1.28 (0.93 to 1.77)

27,294

160

(0.6)

1.07 (0.83 to 1.37)

1.04 (0.80 to 1.36)

 ≥ 10 years

12,118

72

(0.6)

1.24 (0.93 to 1.65)

1.27 (0.93 to 1.74)

29,335

186

(0.6)

1.16 (0.90 to 1.48)

1.06 (0.81 to 1.39)

Birthplace of firstborn child

 Norway (ref)

     

52,834

231

(0.4)

1.00

1.00

 Other than Norway

     

40,483

267

(0.7)

1.51 (1.26 to 1.81)

1.28 (1.06 to 1.55)

  1. a Adjusted for year of birth, maternal age, marital status, consanguinity, level of education and income; b Adjusted for year of birth, parity, maternal age, marital status, consanguinity, level of education and income; c Missing data only refers to information on paternal country of birth, father can still be known by other variables in the data-set; d Missing data not included (primiparous: 1154 births, multiparous: 1283 births)