Table 3 Adjusted odds ratio for select obstetric interventions by Health Service Executive hospital region, Republic of Ireland, 2005-2009

Induction of labour ^a,b

Prostaglandin

1.00

0.86 (0.82-0.90)

1.75 (1.68-1.82)

1.12 (1.07-1.17)

Oxytocin

1.00

0.24 (0.22-0.25)

0.24 (0.23-0.26)

0.25 (0.23-0.26)

Artificial rupture of membrane

1.00

0.69 (0.65-0.72)

0.85 (0.81-0.89)

1.85 (1.77-1.93)

Other^c

1.00

1.10 (1.06-1.13)

1.00 (0.97-1.03)

1.32 (1.28-1.36)

Total induction

1.00

0.77 (0.75-0.79)

0.95 (0.92-0.97)

1.20 (1.17-1.23)

Pain relief ^a,d

Epidural anaesthesia

1.00

0.90 (0.88-0.92)

1.05 (1.03-1.07)

0.78 (0.77-0.80)

Mode of delivery

Elective caesarean^b,e

1.00

2.36 (2.26-2.46)

2.42 (2.33-2.52)

2.74 (2.63-2.86)

Emergency caesarean^a,f

1.00

1.36 (1.31-1.40)

1.21 (1.18-1.25)

1.23 (1.19-1.27)

Vacuum^a,f

1.00

1.54 (1.50-1.59)

1.26 (1.22-1.29)

1.36 (1.32-1.41)

Forceps^a,f

1.00

0.76 (0.72-0.79)

0.81 (0.78-0.85)

0.54 (0.51-0.58)

Non-operative vaginal^a,f

1.00

0.68 (0.67-0.70)

0.79 (0.77-0.81)

0.78 (0.76-0.80)

Select procedures

Blood transfusion^b,e

1.00

1.13 (1.03-1.23)

0.85 (0.78-0.93)

0.51 (0.46-0.57)

Episiotomy^g,h

1.00

0.40 (0.39-0.42)

0.58 (0.57-0.60)

0.75 (0.72-0.77)