Document Detail


Variables associated with successful vaginal birth after one cesarean section: a proposed vaginal birth after cesarean section score.
MedLine Citation:
PMID:  15580540     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The objective of this study was to define the variables associated with vaginal birth after cesarean section (VBAC) and to develop a scoring system for the prediction of successful VBAC. We searched our computerized database for parturients with a history of one low-transverse cesarean section (CS) who were delivered during the year 2000. Variables were categorized according to the time period in which they were obtained: (1) first prenatal visit, (2) at the onset of labor, and (3) during labor. Univariate and multiple stepwise logistic regression models were fitted to calculate odds ratios (ORs) and 95% confidence intervals (CIs). Of the 475 parturients with a history of one previous CS, 136 underwent elective CS and 339 underwent a trial of VBAC, of whom 82% were successful. Of the variables that can be obtained at the onset of labor, five were significantly associated with successful VBAC: abnormal presentation as the indication for the primary CS (OR, 7.4; 95% CI 2.8 to 19.2), a previous VBAC (OR, 7.2; 95% CI, 2.1 to 24.8), cervical dilation (OR, 2.5; 95% CI, 1.3 to 4.9), gestational age < or = 41 weeks (OR, 2.8; 95% CI, 1.1 to 7.1), and lower gestational age at the primary CS (OR, 1.2; 95% CI, 1.02 to 1.4). In the proposed VBAC score, each of the four most significant variables was assigned a score ranging between 0 and 3 based on the probability for VBAC. A score < or = 2 was associated with a success rate of 42%, a score between 3 and 6 was associated with a rate of 81%, and a score between 7 and 10 was associated with a 98% successful VBAC rate (p < 0001). The proposed VBAC score may help obstetricians when counseling their patients regarding the individual likelihood of a successful VBAC.
Authors:
Ron Gonen; Ada Tamir; Shimon Degani; Gonen Ohel
Publication Detail:
Type:  Evaluation Studies; Journal Article    
Journal Detail:
Title:  American journal of perinatology     Volume:  21     ISSN:  0735-1631     ISO Abbreviation:  Am J Perinatol     Publication Date:  2004 Nov 
Date Detail:
Created Date:  2004-12-06     Completed Date:  2005-03-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8405212     Medline TA:  Am J Perinatol     Country:  United States    
Other Details:
Languages:  eng     Pagination:  447-53     Citation Subset:  IM    
Affiliation:
Department of Obstetrics and Gynecology, Bnai Zion Medical Center, Haifa, Israel.
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MeSH Terms
Descriptor/Qualifier:
Adult
Databases, Factual
Decision Support Techniques*
Female
Humans
Israel / epidemiology
Logistic Models
Odds Ratio
Predictive Value of Tests
Pregnancy
Vaginal Birth after Cesarean / statistics & numerical data*

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


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