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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.