Skip to main content

Table 2 Maternal, pregnancy, delivery, and infant characteristics by mode of delivery

From: Preterm birth by vacuum extraction and neonatal outcome: a population-based cohort study

 

Total

Unassisted vaginal delivery

CS during labor

Vacuum extraction

 

N = 40,764

n = 32,940%

n = 5,505%

n = 2,319%

Maternal age, yrs

    

-19

1,063

85.0

10.3

4.7

20-24

6,130

85.6

9.3

5.0

25-29

12,845

82.2

11.6

6.2

30-34

12,767

79.8

14.2

6.0

35-39

6,380

76.4

18.6

5.0

>39

1,351

72.7

22.1

5.3

Missing

228

81.6

13.6

4.8

Maternal height, cm

    

-155

2,481

75.6

18.0

6.4

156-160

6,538

79.9

14.3

5.8

161-165

10,336

81.0

13.0

6.0

166-170

10,129

81.8

12.5

5.7

>170

7,169

81.9

13.1

5.0

Missing

4,111

80.6

14.1

5.3

Maternal BMI

    

Underweight

816

83.3

11.0

5.6

Normal

14,197

81.2

12.8

6.0

Overweight

6,124

79.0

15.2

5.8

Obese

2,944

76.4

19.4

4.1

Missing

16,683

81.7

12.6

5.7

Parity

    

Primipara

18,120

80.0

11.6

8.4

Multipara

22,644

81.8

15.9

2.3

Preeclampsia

    

Yes

1,833

64.2

28.3

7.5

No

38,931

81.6

12.8

5.6

Diabetes

    

Yes

1,434

65.9

26.2

7.9

No

39,330

81.3

13.0

5.6

Induced labor

    

Yes

6,372

73.8

19.9

6.3

No

34,392

82.1

12.3

5.6

EA

    

Yes

8,894

80.9

7.3

11.8

No

31,870

80.8

15.2

4.0

Gestational age, weeks

    

22-27

1,276

77.0

22.4

0.6

28-31

2,344

72.0

25.5

2.5

32-36

37,144

81.5

12.4

6.1

Infant birthweight, g

    

< 1500

2,367

69.8

28.7

1.4

1501-2000

3,365

70.5

25.5

4.0

2001-2500

9,691

79.9

14.5

5.7

2501-3000

15,613

84.5

9.2

6.3

3001-4000

9,079

82.9

10.6

6.5

Missing

649

70.4

25.0

4.6

  1. Population based cohort consisting of 40 764 preterm deliveries.
  2. CS = caesarean section, BMI = Body Mass Index (weight in kilograms/height in meters2), EA = Epidural Analgesia.