Document Detail

Contribution of select maternal groups to temporal trends in rates of caesarean section.
MedLine Citation:
PMID:  20707951     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: To estimate the contribution of select maternal groups to temporal trends in Caesarean section (CS) rates. METHODS: Using the Nova Scotia Atlee Perinatal Database, all deliveries by CS during the 24-year period from 1984 to 2007, at the Women's Hospital, IWK Health Centre were identified. Deliveries by CS were classified into groups using parity (nullipara/multipara), plurality (singleton/multiple), presentation (cephalic/breech/transverse), gestational age (term/preterm), history of previous CS (previous CS/no previous CS), and labour (spontaneous/induced/no labour). CS rates in each group and the contribution of each group to the overall CS rate was determined for three eight-year epochs. The risk of CS in each group over time, accounting for identified maternal, fetal, and obstetric practice factors, was evaluated using logistic regression. RESULTS: Of 113,016 deliveries, 23,232 (20.6%) were identified as deliveries by CS meeting the inclusion and exclusion criteria. The CS rate rose from 16.8% in 1984 to 1991 to 26.8% in 2000 to 2007 (P < 0.001). The biggest contributors to the overall CS rate in the last study epoch (2000-2007) were nulliparous women with singleton, cephalic, term pregnancies with spontaneous or induced labour; women with singleton, cephalic, term pregnancies with previous CS; and women with breech presentation. Adjusted analyses explained some increases in the rate of CS and demonstrated reduced risks in others. CONCLUSION: Only some temporally increased CS rates in select maternal groups remain increased after adjusting for confounding variables. The identification of potentially modifiable maternal risk factors, re-evaluation of the indications and techniques for induction of labour in nulliparous women, provision of clinical services for vaginal birth after Caesarean section, and external cephalic version for selected breech presentation are important clinical management areas to consider for safely lowering the Caesarean section rate.
Victoria M Allen; Thomas F Baskett; Colleen M O'Connell
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of obstetrics and gynaecology Canada : JOGC = Journal d'obstétrique et gynécologie du Canada : JOGC     Volume:  32     ISSN:  1701-2163     ISO Abbreviation:  J Obstet Gynaecol Can     Publication Date:  2010 Jul 
Date Detail:
Created Date:  2010-08-16     Completed Date:  2010-09-29     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101126664     Medline TA:  J Obstet Gynaecol Can     Country:  Canada    
Other Details:
Languages:  eng     Pagination:  633-41     Citation Subset:  IM    
Department of Obstetrics and Gynaecology, Dalhousie University, Halifax, NS.
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MeSH Terms
Breech Presentation
Cesarean Section / statistics & numerical data,  trends*
Cohort Studies
Labor, Induced
Nova Scotia
Pregnancy, Multiple
Grant Support
//Canadian Institutes of Health Research

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

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