Risk factors for secondary arrest of labor among women >41 weeks' gestation with an unfavorable cervix undergoing membrane sweeping for cervical ripening

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Abstract
Objective: To identify the risk factor(s) for secondary arrest of labor among women with an unfavorable cervix at >41 weeks' gestation. Methods: Prospectively all gravid women with a Bishop score of ≤4 and no contraindication to a vaginal delivery were candidates for this study. Univariate analysis followed by logistic regression modeling were used to identify variables with a significant association. Results: Over a 9-month period, 115 women entered into the study. In univariate analysis, variables with a significant association with cesarean delivery: (1) non-Caucasian race (P=0.007), Bishop score P=0.001, and reason for admission (P=0.017). Logistic regression analysis yielded OR 4.7 (1.6, 15) non-Caucasian race and 9.5 (3.2, 30.8) Bishop 41 weeks with an unfavorable cervix, non-Caucasian race and a failure to achieve a Bishop score of ≥7 prior to hospitalization were significant risk factors for abdominal delivery.

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