Table 2 Numbers and odds ratios (ORs) of perinatal death by country of birth, and background factors

Mother’s country of birth

Norway

8097

1054647

Reference

Reference

Pakistan

159

11192

1.85 (1.58 – 2.17)

1.72 (1.46 – 2.02)

Vietnam

44

6125

0.94 (0.69 – 1.26)

0.80 (0.59 – 1.08)

Somalia

71

5339

1.73 (1.37 – 2.19)

1.83 (1.44 – 2.34)

Sri Lanka

61

4872

1.63 (1.26 – 2.10)

1.76 (1.36 – 2.27)

Philippines

47

4615

1.33 (0.99 – 1.77)

1.20 (0.90 – 1.61)

Iraq

31

3798

1.06 (0.75 – 1.51)

1.18 (0.82 – 1.69)

Thailand

26

3178

1.07 (0.72 – 1.57)

1.02 (0.69 – 1.51)

Afghanistan

16

649

3.21 (1.96 – 5.28)

4.01 (2.40 – 6.71)

Mother’s age at delivery

<20

391

37545

1.42 (1.27 – 1.58)

1.14 (1.02 – 1.27)

20-24

1628

221415

Reference

Reference

25-29

2743

396675

0.94 (0.88 – 1.00)

1.07 (1.01 – 1.14)

30-34

2426

308155

1.07 (1.00 – 1.14)

1.25 (1.17 – 1.34)

≥35

1364

130625

1.42 (1.32 – 1.53)

1.53 (1.41 – 1.65)

Plurality

Singleton

7481

1061349

Reference

Reference

Multiple

1071

33066

4.60 (4.31 – 4.90)

1.57 (1.46 – 1.68)

Parity

0

3730

453860

Reference

Reference

1

2597

388417

0.81 (0.77 – 0.86)

0.88 (0.83 – 0.92)

2

1444

182964

0.96 (0.90 – 1.02)

0.95 (0.89 – 1.02)

3+

781

69174

1.37 (1.27 – 1.48)

1.11 (1.01 – 1.21)

Year of birth

1986 – 1990

2545

271793

1.45 (1.37 – 1.55)

1.19 (1.11 – 1.27)

1991-1995

2304

284670

1.26 (1.18 – 1.34)

0.95 (0.89 – 1.01)

1996- 2000

2027

277461

1.13 (1.06 – 1.21)

0.95 (0.89 – 1.02)

2001 – 2005

1676

260491

Reference

Reference

Gestational age at birth

<37 weeks

5671

135321

13.95 (13.33- 14.60)

13.16 (12.56- 13.80)

≥ 37 weeks

2881

959094

Reference

Reference