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Table 2 Maternal and perinatal characteristics by mode of delivery in a population-based cohort of singleton pregnancies starting with labour and ending at term

From: Vacuum assisted birth and risk for cerebral complications in term newborn infants: a population-based cohort study

 

Spontaneous vaginal

Emergency CS

Vacuum extraction

N = 1,010,229

N = 851,347

N = 75,216

N = 87,150

 

%

%

%

Maternal age (years)

   

-19

1.9

1.1

1.6

20-24

13.6

10.1

13.5

25-29

31.2

28.1

32.8

30-34

34.6

36.1

34.8

35-39

15.6

19.4

14.4

>39

2.8

4.7

2.6

Missing

0.3

0.4

0.3

Maternal height (cm)

   

-155

3.6

8.1

4.7

156-160

12.8

19.4

15.2

161-165

24.7

27.1

26.1

166-170

28.5

23.9

26.9

>170

24.5

15.0

20.9

Missing

6.0

6.4

6.1

Maternal BMI

   

Underweight

1.5

0.9

1.6

Normal

36.6

30.3

38.1

Overweight

14.3

17.6

14.2

Obese

5.8

10.0

5.0

Missing

41.8

41.2

41.1

Parity

   

Multipara

60.7

35.3

20.8

Primipara

39.3

64.7

79.2

Indication

   

Signs of fetal distress

1.1

29.7

34.9

Prolonged labour

6.4

32.9

38.3

Both

0.2

8.3

10.8

None of these

92.3

29.2

16.1

Gestational week

   

37-38

16.3

16.8

11.4

39-41

77.1

64.3

75.8

42-45

6.6

18.9

12.8

Infant birthweight (g)

   

≤3000

9.5

11.1

9.2

3001-3500

32.9

25.5

30.9

3501-4000

37.7

33.0

37.7

4001-4500

16.1

21.6

17.9

>4500 gram

3.6

8.6

4.1

Missing

0.2

0.3

0.2