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Association Between Second‐Trimester Cervical Length and Cesarean Delivery in Multiparas
Author(s) -
Miller Emily S.,
Einerson Brett,
Sahabi Sadia,
Grobman William A.
Publication year - 2014
Publication title -
journal of ultrasound in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.574
H-Index - 91
eISSN - 1550-9613
pISSN - 0278-4297
DOI - 10.7863/ultra.33.10.1733
Subject(s) - medicine , quartile , odds ratio , confounding , obstetrics , gestation , confidence interval , logistic regression , retrospective cohort study , pregnancy , gynecology , surgery , biology , genetics
Objectives The purpose of this study was to determine whether there is an association between second‐trimester cervical length and cesarean delivery in women with a prior vaginal delivery. Methods We conducted a retrospective cohort study of multiparous women with singleton gestations who underwent routine cervical length screening between 18 and 24 weeks' gestation and labored after 34 weeks. Cervical lengths were divided into quartiles, and the frequency of cesarean delivery was compared across the groups. Indications for cesarean delivery were also compared. A multivariable logistic regression was performed with cervical length as a categorical and a continuous variable to adjust for potential confounders. Results Of the 2260 multiparas who met inclusion criteria, 63 (2.8%) underwent a cesarean delivery. We observed no association between the second‐trimester cervical length quartile and the frequency of cesarean delivery (2.1%, 3.5%, 2.3%, and 3.1%, respectively; P = .434). Further analysis using cervical length as a continuous variable and controlling for potential confounding variables did not change this result (adjusted odds ratio, 1.08; 95% confidence interval, 0.80–1.46). Conclusions The second‐trimester cervical length quartile in multiparas is not associated with an increased frequency of cesarean delivery. This finding differs from studies of nulliparas.