Building a Prediction Model for Vacuum-Assisted Operative Vaginal Delivery Risk

摘要

Aim: The objective of this study was to evaluate the risk factorsudfor operative vaginal delivery and to propose a new nomogramudfor predicting the risk. Methods: We retrospectivelyudanalyzed the data of 1,955 pregnancies that occurred inudour clinic between the years 2007 and 2008. Included wereudsingleton pregnancies with labor diagnosis after the 36thudgestational week in which spontaneous or operative vaginaluddeliveries occurred. In this study, the operative delivery wasudcarried out exclusively by vacuum extraction. Results: Afterudunivariate analysis and multivariate logistic regression stepwiseudmodel selection, maternal age, nulliparity, medically assistedudprocreation, gestational age at birth, male fetus, epiduraludanalgesia and medical induction of labor were foundudto be the most predictive variables for operative vaginal delivery.udConsidering these factors we propose a new nomogramudfor an objectified determination of the risk of operativeudvaginal delivery. Conclusions: The new nomogram we proposeudcould be an important tool for an objectified determinationudof the risk of operative vaginal delivery by vacuumudextraction in individualized patient counseling.