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Table 4 Delivery and birth outcomes in relation to group (symptom-free (SF), nausea only (NP), and nausea and vomiting (NVP))

From: Pregnancy complications and birth outcomes among women experiencing nausea only or nausea and vomiting during pregnancy in the Norwegian Mother and Child Cohort Study

 

n

SF

NP

NVP

P valuea

51 675

(n = 14 234)

(n = 20 371)

(n = 17 070)

 
 

n (%)

n (%)

n (%)

 

Gestation length

51 675

   

0.001

Normal range 37–42 weeks

49 181

13 460 (94.6)

19 461 (95.5)

16 260 (95.3)

 

Early birth 35–36 weeks

1545

491 (3.4)

553 (2.7)

501 (2.9)

 

Very early birth 28–34 weeks

949

283 (2.0)

357 (1.8)

309 (1.8)

 

Caesarean delivery

51 675

   

<0.001

No

44 416

12 104 (85.0)

17 654 (86.7)

14 658 (85.9)

 

Planned caesarean delivery

2544

644 (4.5)

1027 (5.0)

873 (5.1)

 

Emergency caesarean delivery

4065

1270 (8.9)

1447 (7.1)

1348 (7.9)

 

Unspecified

650

216 (1.5)

243 (1.2)

191 (1.1)

 

If yes to caesarean delivery, reason

    

<0.001

Breech presentation

756

283 (29.1)

258 (19.9)

215 (21.0)

 

Previous caesarean delivery

447

116 (11.9)

194 (14.9)

137 (13.4)

 

Pregnancy complication/ill mother

650

175 (18.0)

262 (20.2)

213 (20.8)

 

Poor growth/fetus complication

198

68 (7.0)

83 (6.4)

47 (4.6)

 

Own preference

314

76 (7.8)

130 (10.0)

108 (10.5)

 

Other

931

255 (26.2)

371 (28.6)

305 (29.8)

 

Multiple answers

465

    

Mortality

51 675

   

0.60

Born alive, lived >1 y

51 585

14 206 (99.8)

20 340 (99.8)

17 039 (99.8)

 

Born alive, died ≤1 y

90

28 (0.2)

31 (0.2)

31 (0.2)

 

Anthropometry

 

Mean (SD)

Mean (SD)

Mean (SD)

P valueb

Weight of placenta at birth (g)

50 115

661.5 (145.2)

677.9 (145.9)

678.3 (144.9)

<0.001

Weight of infant at birth (g)

51 106

3561.5 (515.1)

3638.5 (506.4)

3605.5 (508.6)

<0.001

Length of infant at birth (cm)

49 180

50.4 (2.1)

50.6 (2.0)

50.4 (2.1)

<0.001

Head circ. of infant at birth (cm)

50 319

35.3 (1.5)

35.4 (1.5)

35.3 (1.5)

<0.001

  1. aChi squared test
  2. bOne way analysis of variance