Document Detail

Trends in labour and birth interventions among low-risk women in New South Wales.
MedLine Citation:
PMID:  12069146     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To examine recent trends in obstetric intervention rates among women at low-risk of poor pregnancy outcome. DESIGN: Cross-sectional analytic study SETTING AND POPULATION: A population of 336,189 women categorised as low-risk of a poor pregnancy outcome who gave birth to a live singleton in NSW from 1 January 1990 to 31 December 1997. MAIN OUTCOME MEASURES: Obstetric intervention rates including oxytocin induction and augmentation of labour, epidural analgesia, instrumental births, caesarean section and episiotomy METHODS: Trends over time were assessed by fitting trend-lines to numbers of births or by trends in proportions. Unconditional logistic regression was used to assess the impact of epidural analgesia on instrumental birth over time. RESULTS: Rates of operative births did not rise despite increases in maternal age and use of epidural analgesia. Instrumental births declined over time from 26% to 22% among primiparas and 5% to 4% among multiparas. There was also a shift to vacuum extraction rather than forceps. Although instrumental birth was strongly associated with epidural analgesia, the strength of the association declined over the study period, for primiparas from an adjusted odds ratio of 7.2 to 5.2 and for multiparas from 13.2 to 10.3. CONCLUSIONS: Increased use of epidural analgesia for labour has been a feature of the management of birth at term during the 1990s. The decline in the strength of association between epidural analgesia and instrumental birth may reflect improved epidural techniques and management of epidural labour, and recognition of the adverse maternal outcomes associated with forceps and vacuum births.
Christine L Roberts; Charles S Algert; Ian Douglas; Sally K Tracy; Brian Peat
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  The Australian & New Zealand journal of obstetrics & gynaecology     Volume:  42     ISSN:  0004-8666     ISO Abbreviation:  Aust N Z J Obstet Gynaecol     Publication Date:  2002 May 
Date Detail:
Created Date:  2002-06-18     Completed Date:  2002-12-13     Revised Date:  2009-11-11    
Medline Journal Info:
Nlm Unique ID:  0001027     Medline TA:  Aust N Z J Obstet Gynaecol     Country:  Australia    
Other Details:
Languages:  eng     Pagination:  176-81     Citation Subset:  IM    
Centre for Perinatal Health Services Research, University of Sydney, New South Wales, Australia.
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MeSH Terms
Anesthesia, Obstetrical / trends*
Cesarean Section / trends
Cross-Sectional Studies
Delivery, Obstetric / trends*
Episiotomy / trends
Extraction, Obstetrical / trends
Labor, Induced / trends
Labor, Obstetric / physiology
Logistic Models
Maternal Age
New South Wales
Obstetric Labor Complications
Odds Ratio
Population Surveillance
Pregnancy Outcome*
Retrospective Studies
Risk Assessment
Risk Factors

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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