Risk factors for cesarean delivery in preterm, term and post-term patients undergoing induction of labor with an unfavorable cervix.
OBJECTIVE
To identify risk factors for cesarean delivery in patients with an unfavorable cervix undergoing an indicated induction of labor.


METHODS
This is a secondary analysis of combined data from three prospective randomized trials comparing cervical ripening methods in singleton pregnancies with an unfavorable cervix seeking to identify risk factors for cesarean delivery.


RESULTS
Nine hundred and five women underwent an induction of labor for a variety of indications. Gestational age ranged from 27.0-42.8 weeks (mean of 37.8 weeks) and initial Bishop's score from 0-6 (mean 2.5). There were 613 vaginal deliveries (67.7%) and 292 cesarean deliveries (32.2%). Factors associated with an increased risk for cesarean delivery included nulliparous status, Bishop's score <or=1, body mass index >40 and diabetes mellitus.


CONCLUSIONS
Risk factors for cesarean delivery in women undergoing an indicated induction include a low Bishop's score, high BMI, nulliparity and diabetes.
Ennen
Christopher S
CS
Obstetrics and Gynecology, Naval Medical Center Portsmouth, Portsmouth, Va., USA. chrisennen@mac.com
Bofill
James A
JA
Magann
Everett F
EF
Bass
John D
JD
Chauhan
Suneet P
SP
Morrison
John C
JC
D000328:Adult; D020070:Cervical Ripening / Q000502:physiology; D002585:Cesarean Section / Q000009:adverse effects* / Q000379:methods; D016001:Confidence Intervals; D036861:Delivery, Obstetric / Q000009:adverse effects / Q000379:methods; D005260:Female; D005500:Follow-Up Studies; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007751:Labor, Induced / Q000009:adverse effects / Q000379:methods*; D008423:Maternal Age; D016017:Odds Ratio; D010298:Parity; D011247:Pregnancy; D011256:Pregnancy Outcome; D011273:Pregnancy, Prolonged; D047928:Premature Birth; D011336:Probability; D012042:Registries; D012189:Retrospective Studies; D018570:Risk Assessment; D047929:Term Birth