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Effects of continuity of care by a primary midwife (caseload midwifery) on caesarean section rates in women of low obstetric risk : the COSMOS randomised controlled trial
journal contribution
posted on 2012-01-01, 00:00 authored by H McLachlan, D Forster, M Davey, T Farrell, Lisa GoldLisa Gold, M Biro, L Albers, M Flood, J Oats, U WaldenstromObjective To determine whether primary midwife care (caseload midwifery) decreases the caesarean section rate compared with standard maternity care.
Design Randomised controlled trial.
Setting Tertiary-care women’s hospital in Melbourne, Australia.
Population A total of 2314 low-risk pregnant women.
Methods Women randomised to caseload received antenatal, intrapartum and postpartum care from a primary midwife with some care by ‘back-up’ midwives. Women randomised to standard care received either midwifery or obstetric-trainee care with varying levels of continuity, or community-based general practitioner care.
Main outcome measures Primary outcome: caesarean birth. Secondary outcomes included instrumental vaginal births, analgesia, perineal trauma, induction of labour, infant admission to special/neonatal intensive care, gestational age, Apgar scores and birthweight.
Results In total 2314 women were randomised–1156 to caseload and 1158 to standard care. Women allocated to caseload were less likely to have a caesarean section (19.4% versus 24.9%; risk ratio [RR] 0.78; 95% CI 0.67–0.91; P = 0.001); more likely to have a spontaneous vaginal birth (63.0% versus 55.7%; RR 1.13; 95% CI 1.06–1.21; P < 0.001); less likely to have epidural analgesia (30.5% versus 34.6%; RR 0.88; 95% CI 0.79–0.996; P = 0.04) and less likely to have an episiotomy (23.1% versus 29.4%; RR 0.79; 95% CI 0.67–0.92; P = 0.003). Infants of women allocated to caseload were less likely to be admitted to special or neonatal intensive care (4.0% versus 6.4%; RR 0.63; 95% CI 0.44–0.90; P = 0.01). No infant outcomes favoured standard care.
Conclusion In settings with a relatively high baseline caesarean section rate, caseload midwifery for women at low obstetric risk in early pregnancy shows promise for reducing caesarean births.
Design Randomised controlled trial.
Setting Tertiary-care women’s hospital in Melbourne, Australia.
Population A total of 2314 low-risk pregnant women.
Methods Women randomised to caseload received antenatal, intrapartum and postpartum care from a primary midwife with some care by ‘back-up’ midwives. Women randomised to standard care received either midwifery or obstetric-trainee care with varying levels of continuity, or community-based general practitioner care.
Main outcome measures Primary outcome: caesarean birth. Secondary outcomes included instrumental vaginal births, analgesia, perineal trauma, induction of labour, infant admission to special/neonatal intensive care, gestational age, Apgar scores and birthweight.
Results In total 2314 women were randomised–1156 to caseload and 1158 to standard care. Women allocated to caseload were less likely to have a caesarean section (19.4% versus 24.9%; risk ratio [RR] 0.78; 95% CI 0.67–0.91; P = 0.001); more likely to have a spontaneous vaginal birth (63.0% versus 55.7%; RR 1.13; 95% CI 1.06–1.21; P < 0.001); less likely to have epidural analgesia (30.5% versus 34.6%; RR 0.88; 95% CI 0.79–0.996; P = 0.04) and less likely to have an episiotomy (23.1% versus 29.4%; RR 0.79; 95% CI 0.67–0.92; P = 0.003). Infants of women allocated to caseload were less likely to be admitted to special or neonatal intensive care (4.0% versus 6.4%; RR 0.63; 95% CI 0.44–0.90; P = 0.01). No infant outcomes favoured standard care.
Conclusion In settings with a relatively high baseline caesarean section rate, caseload midwifery for women at low obstetric risk in early pregnancy shows promise for reducing caesarean births.
History
Journal
BJOG : International journal of obstetrics and gynaecologyVolume
119Pagination
1483 - 1492Publisher
Wiley-Blackwell Publshing LtdLocation
Oxford, EnglandPublisher DOI
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0140-7686eISSN
1471-0528Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2012, Wiley-Blackwell Publishing Ltd.Usage metrics
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