Comparison of digital and ultrasonographic examination of the cervix in predicting time interval from induction to delivery in women with a low Bishop score

被引:62
作者
Rozenberg, P
Chevret, S
Chastang, C
Ville, Y
机构
[1] Versailles St Quentin Univ, Poissy St Germain Hosp, Dept Obstet & Gynecol, Poissy, France
[2] Univ Paris 07, St Louis Hosp,APHP, INSERM,ERM 321, Dept Biostat, F-75221 Paris 05, France
关键词
D O I
10.1111/j.1471-0528.2004.00549.x
中图分类号
R71 [妇产科学];
学科分类号
100211 ;
摘要
Objective To compare pre-induction ultrasonographic cervical length and Bishop score in predicting time to delivery after labour induction with prostaglandins. Design Prognostic cohort study. Setting Tertiary referral maternity unit in a teaching hospital. Population Two hundred and sixty-six women with singleton pregnancies at between 34(+0) and 41(+3) weeks of gestation requiring induction of labour with prostaglandins for medical indications. Methods A secondary analysis of a trial comparing two prostaglandins. Assessment of the Bishop score and measurement of the cervical length by transvaginal sonography were performed by two operators, blinded to each other's results. We estimated the predictive effects on the outcomes of ultrasonographic cervical length and Bishop score. Main outcome measure Time intervals from induction to delivery and to vaginal delivery. Results Cervical length and Bishop score were associated with the time interval from induction to delivery, based on univariable analyses. When considered jointly in a multivariable model, only the Bishop score was significantly related to the outcome: The higher the Bishop score, the higher the hazard to delivery [hazard ratio (HR): 1.2, 95% confidence interval (CI): 1.1-1.3], illustrating that once the Bishop score is taken into account, further knowledge of cervical ultrasound length (HR: 0.99, 95% CI: 0.98-1.0) did not add any predictive information. Also, Bishop score was predictive of time interval between induction and vaginal delivery (HR: 1.2, 95% CI: 1.1-1.4) while cervical length had no additional predictive value (HR: 0.99, 95% CI: 0.98-1.0) when both cervical length and Bishop score were introduced in the model. Conclusions The Bishop score appears to be a better predictor of the time interval from induction to delivery and to vaginal delivery than cervical length after induction of labour for medical reasons.
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页码:192 / 196
页数:5
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