摘要
Objectives The purpose of this study was to evaluate the association between preinduction modified Bishops score and obstetric outcome, including successful vaginal birth after prior cesarean (VBAC) and uterine rupture in patients with a previous cesarean undergoing induction of labor. Study design Medical records of all patients who had an induction of labor after a previous cesarean in our institution between 1988 and 2002 were reviewed. Patients were divided into 4 groups according to the modified Bishops score (0 to 2, 3 to 5, 6 to 8, and 9 to 12). The rates of successful VBAC, symptomatic uterine rupture, and other obstetric outcomes were evaluated in each group. Multivariate regression analyses were performed to adjust for confounding factors. Results Out of 685 women included in the study, 187 (27.3%) had a modified Bishops score <2, 276 (40.3%) of 3 to 5, 189 (27.6%) of 6 to 8, and 33 (4.8%) of 9 to 12. The rate of successful VBAC significantly correlated with the modified Bishops score (57.5%, 64.5%, 82.5%, and 97.0%, respectively, P <.001). However, the rate of uterine rupture was not statistically significant between the groups (2.1%, 1.8%, 0.5%, 0.0%, P=.48). After adjusting for confounding variables, a modified Bishops score ≥6 remained associated with successful VBAC (odds ratio [OR] 2.07, 95%CI 1.28-3.35, P <..001). Conclusion The modified Bishops score before induction of labor is an independent factor associated with successful VBAC.
Objectives The purpose of this study was to evaluate the association between preinduction modified Bishops score and obstetric outcome, including successful vaginal birth after prior cesarean (VBAC) and uterine rupture in patients with a previous cesarean undergoing induction of labor. Study design Medical records of all patients who had an induction of labor after a previous cesarean in our institution between 1988 and 2002 were reviewed. Patients were divided into 4 groups according to the modified Bishops score (0 to 2, 3 to 5, 6 to 8, and 9 to 12). The rates of successful VBAC, symptomatic uterine rupture, and other obstetric outcomes were evaluated in each group. Multivariate regression analyses were performed to adjust for confounding factors. Results Out of 685 women included in the study, 187 (27.3%) had a modified Bishops score <2, 276 (40.3%) of 3 to 5, 189 (27.6%) of 6 to 8, and 33 (4.8%) of 9 to 12. The rate of successful VBAC significantly correlated with the modified Bishops score (57.5%, 64.5%, 82.5%, and 97.0%, respectively, P <.001). However, the rate of uterine rupture was not statistically significant between the groups (2.1%, 1.8%, 0.5%, 0.0%, P=.48). After adjusting for confounding variables, a modified Bishops score ≥6 remained associated with successful VBAC (odds ratio [OR] 2.07, 95%CI 1.28-3.35, P <..001). Conclusion The modified Bishops score before induction of labor is an independent factor associated with successful VBAC.
