title: Variables that predict the success of labor induction.
abstract: BACKGROUND
  To analyze the clinical and sonographic variables that affect the success of labor induction.
  
  
  METHODS
  Bishop score, cervical length, and parity were studied in 196 pregnant women in the prediction of successful vaginal delivery within 24 hr of induction. Logistic regression and segmentation analysis were performed.
  
  
  RESULTS
  Cervical length [odds ratio (OR) 1.089, P<0.001], Bishop score (OR 0.751, P=0.001), and parity (OR 6.85, P<0.001) predict the success of labor induction. The best cut-off points for cervical length were <16.5, 16.5--27, and >27 mm (P=0.0016). In the analysis of the Bishop score, we also obtained three discriminatory points, 0, 1--4, and >4 (P=0.0006), that best predict the labor induction. Finally, in a global analysis of the variables studied, the best statistic sequence that predicts the labor induction was found when we introduced parity in the first place. The success of labor induction in nulliparous was 50.77 and 83.33% in multiparous (P=0.0001).
  
  
  CONCLUSIONS
  Cervical length, Bishop score, and parity predict the success of labor induction.
authors.affiliation: Department of Obstetrics and Gynecology, Santa Cristina University Hospital, Madrid, Spain. Isanfrutosl@sego.es
authors.forename: Beatriz
authors.initials: B
authors.lastname: Bueno
authors.forename: Luis
authors.initials: L
authors.lastname: San-Frutos
authors.forename: Francisco
authors.initials: F
authors.lastname: Salazar
authors.forename: Tirso
authors.initials: T
authors.lastname: Pérez-Medina
authors.forename: Virginia
authors.initials: V
authors.lastname: Engels
authors.forename: Beatriz
authors.initials: B
authors.lastname: Archilla
authors.forename: Fernando
authors.initials: F
authors.lastname: Izquierdo
authors.forename: José
authors.initials: J
authors.lastname: Bajo
mesh_terms: D000293:Adolescent; D000328:Adult; D002584:Cervix Uteri / Q000000981:diagnostic imaging*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007751:Labor, Induced; D016015:Logistic Models; D010298:Parity; D011237:Predictive Value of Tests; D011247:Pregnancy; D011256:Pregnancy Outcome; D012372:ROC Curve; D016216:Ultrasonography, Prenatal / Q000379:methods*