A new objective scoring system for the prediction of successful induction of labour

Department of Obstetrics and Gynecology, Jawaharlal Institute of Medical Education and Research (JIPMER), Dhanvantari Nagar, Pondicherry 605006, India.
Journal of Obstetrics and Gynaecology (Impact Factor: 0.6). 02/2012; 32(2):145-7. DOI: 10.3109/01443615.2011.637142
Source: PubMed

ABSTRACT A prospective study was done in 311 women undergoing induction of labour for the formulation of a new score, which will be more objective than the conventional Bishop's score. Pre-induction cervical assessment was done by the transvaginal sonographic parameters followed by the digital examination. Labour induction was successful in 79.09%. A new score was formulated using the parameters having independent association and weighting of individual components was given according to its regression coefficients. A new score with a maximum value of 13 was proposed. The best cut-off point for the new score in receiver operating characteristics curve was six with a sensitivity of 95.5% and specificity of 84.6%. The new score was found to have a better area under the curve than the conventional score.

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    ABSTRACT: Induction of labor is one of the most common obstetric interventions in contemporary obstetrics. The aim of the study was to evaluate the clinical and sonographic parameters in prediction of success of labor induction. The prospective study included 422 women in whom induction of labor was carried out at the Department of Obstetrics and Gynecology of Clinical Centre of Vojvodina. The role of body mass index and age of women, parity Bishop score, cervical length measured by transvaginal ultrasound was evaluated in regard of the success of induction, which was considered successful if a vaginal delivery occurred within 24 hours after the onset of induction. Data were statistically analyzed by univariate statistical analysis and Pearson's chi2 test. Out of 422 women, induction of labor was successful in 356 (84.4%), and it failed in 66 (15.6%) cases. The values of Bishop score and cervical length had positive correlation with the success of induction. Bishop score and transvaginal cervical length were both reliable predictors in determining the success of labor induction, as well as parity and BMI. These parameters are mostly complementary, not competitive in prediction of labor induction success.
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