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Cerclage position, cervical length and preterm delivery in women undergoing ultrasound indicated cervical cerclage: A retrospective cohort study

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  • Joanna R Cook
  • Susan Chatfield
  • Manju Chandiramani
  • Lindsay Kindinger
  • Stefano Cacciatore
  • Lynne Sykes
  • Tiong Teoh
  • Andrew Shennan
  • Vasso Terzidou
  • Phillip R Bennett

Abstract

Objective: The objectives were to assess whether anatomical location of ultrasound (USS) indicated cervical cerclage and/or the degree of cervical shortening (cervical length; CL) prior to and following cerclage affects the risk of preterm birth (PTB). Method: A retrospective cohort study of 179 women receiving cerclage for short cervix (≤25mm) was performed. Demographic data, CL before and after cerclage insertion, height of cerclage (distance from external os) and gestation at delivery were collected. Relative risk (RR) and odds ratio (OR) of preterm delivery were calculated according to the anatomical location of the cerclage within the cervix and the CL before and after cerclage as categorical and continuous variables. Partition tree analysis was used to identify the threshold cerclage height that best predicts PTB. Results: 25% (n = 45) delivered

Suggested Citation

  • Joanna R Cook & Susan Chatfield & Manju Chandiramani & Lindsay Kindinger & Stefano Cacciatore & Lynne Sykes & Tiong Teoh & Andrew Shennan & Vasso Terzidou & Phillip R Bennett, 2017. "Cerclage position, cervical length and preterm delivery in women undergoing ultrasound indicated cervical cerclage: A retrospective cohort study," PLOS ONE, Public Library of Science, vol. 12(6), pages 1-9, June.
    • Handle: RePEc:plo:pone00:0178072
    DOI: 10.1371/journal.pone.0178072
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