61 Regional variations in childbirth interventions in the Netherlands Table 8. Correlations between interventions and obstetric outcomes Obstetric outcomes Apgar score below 7 at 5 minutes 3rd and 4th degree perineal tear for vaginal births Postpartum haemorrhages ≥1000 ml Interventions among all women Induction of labour ρ = 0.11 ρ = - 0.12 ρ = 0.09 Augmentation after spontaneous onset of labour ρ = 0.05 ρ = 0.09 ρ = 0.87 Intrapartum oxytocin use ρ = 0.41 ρ = 0.16 ρ = 0.35 Epidural* ρ = - 0.10 ρ = 0.02 ρ = 0.22 Other pharmacological pain relief* ρ = - 0.04 ρ = - 0.14 ρ = 0.20 Spontaneous vaginal birth ρ = - 0.29 ρ = 0.00 ρ = 0.55 Instrumental vaginal birth* ρ = 0.24 ρ = - 0.11 ρ = - 0.55 Caesarean section ρ = 0.20 ρ = 0.09 ρ = 0.16 Involvement paediatrician <24 hours ρ = 0.17 ρ = - 0.13 ρ = 0.24 *Measured in a group of women without prelabour CS. 2
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