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Table 5 Type of birth and intervention rates by planned place of birth- all women*

From: Birthplace in New South Wales, Australia: an analysis of perinatal outcomes using routinely collected data

Intervention and planned place of birth

No. events/births

Incidence of events/100 births

Unadjusted

Adjusted

Spontaneous vertex birth

192 432/257 888

74.6

  

Hospital

179 307/242 715

73.9

1.00

1.00

Birth centre

12 447/14 477

86.0

2.17 (2.07-2.28)

2.73 (2.60-2.87)

Home birth

678/696

97.4

3.76 (2.91-4.86)

4.05 (3.09-5.32)

Ventouse delivery

25 940/257 888

10.1

  

Hospital

25 060/242 715

10.3

1.00

1.00

Birth centre

867/14 477

6.0

0.55 (0.52-0.60)

0.51 (0.47-0.54)

Home birth

13/696

1.9

0.16 (0.09-0.27)

0.18 (0.10-0.30)

Forceps delivery

13 188/257 888

5.1

  

Hospital

12 705/242 715

5.2

1.00

1.00

Birth centre

468/14 477

3.2

0.61 (0.55-0.66)

0.55 (0.50-0.60)

Home birth

15/696

2.2

0.37 (0.22-0.62)

0.44 (0.26-0.73)

Intrapartum caesarean section

26 385/257 888

10.2

  

Hospital

25 669/242 715

10.6

1.00

1.00

Birth centre

693/14 477

4.8

0.43 (0.39-0.46)

0.36 (0.34-0.39)

Home birth

23/696

3.3

0.27 (0.18-0.41)

0.27 (0.17-0.40)

3rd or 4th degree perineal trauma**

    

with episiotomy extensions

7 557/231 403

3.3

  

Hospital

7 083/216 955

3.3

1.00

1.00

Birth centre

461/13 782

3.3

1.03 (0.93-1.13)

0.93 (0.84-1.02)

Home birth

13/666

2.0

0.55 (0.32-0.96)

0.66 (0.38-1.14)

Syntocinon augmentation

51 719/257 888

20.1

  

Hospital

50 067/242 715

20.6

1.00

1.00

Birth centre

1 612/14 477

11.1

0.48 (0.46-0.51)

0.43 (0.41-0.45)

Home birth

40/696

5.7

0.22 (0.16-0.30)

0.24 (0.17-0.33)

Epidural or spinal analgesia for labour

73 012/257 888

28.3

  

Hospital

70 635/242 715

29.1

1.00

1.00

Birth centre

2 321/14 477

16.0

0.47 (0.44-0.49)

0.40 (0.37-0.41)

Home birth

56/696

8.1

0.20 (0.15-0.26)

0.19 (0.15-0.26)

General anaesthesia ***

4 429/26 365

16.8

  

Hospital

4 357/25 649

17.0

1.00

1.00

Birth centre

70/693

10.1

0.55 (0.43-0.71)

0.61 (0.48-0.79)

Home birth

2/23

8.7

0.47 (0.11-1.99)

0.71 (0.16-3.06)

Episiotomy **

41 885/231 396

18.1

  

Hospital

40 506/216 948

18.7

1.00

1.00

Birth centre

1 353/13 782

9.8

0.47 (0.45-0.50)

0.41 (0.39-0.44)

Home birth

26/666

3.9

0.17 (0.11-0.25)

0.18 (0.12-0.26)

  1. *Cases with missing data were not included in rates or regression calculations.
  2. **Denominator = vaginal birth.
  3. ***Denominator = caesarean section.