{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2023,10,6]],"date-time":"2023-10-06T06:14:11Z","timestamp":1696572851498},"reference-count":19,"publisher":"Wiley","issue":"5","license":[{"start":{"date-parts":[[2015,8,18]],"date-time":"2015-08-18T00:00:00Z","timestamp":1439856000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["obgyn.onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Ultrasound in Obstet &amp; Gyne"],"published-print":{"date-parts":[[2015,11]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objective<\/jats:title><jats:p>To determine whether second\u2010trimester cervical length (<jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content>) in women with a twin pregnancy is associated with the risk of emergency Cesarean section.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>This was a secondary analysis of two randomized trials conducted in 57 hospitals in The Netherlands. We assessed the univariable association between risk indicators, including second\u2010trimester <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content> in quartiles, and emergency Cesarean delivery using a logistic regression model. For multivariable analysis, we assessed whether adjustment for other risk indicators altered the associations found in univariable (unadjusted) analysis. Separate analyses were performed for suspected fetal distress and failure to progress in labor as indications for Cesarean section.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In total, 311 women with a twin pregnancy attempted vaginal delivery after 34\u2009weeks' gestation. Emergency Cesarean delivery was performed in 111 (36%) women, of which 67 (60%) were performed owing to arrest of labor. There was no relationship between second\u2010trimester <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content> and Cesarean delivery (adjusted odds ratio (<jats:styled-content style=\"fixed-case\">aOR<\/jats:styled-content>): 0.97 for <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content> 26<jats:sup>th<\/jats:sup>\u201350<jats:sup>th<\/jats:sup> percentiles; 0.71 for <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content> 51<jats:sup>st<\/jats:sup>\u2009\u2013\u200975<jats:sup>th<\/jats:sup> percentiles; and 0.92 for <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content>\u2009&gt;\u200975<jats:sup>th<\/jats:sup> percentile, using <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content>\u2009\u2264\u200925<jats:sup>th<\/jats:sup> percentile as reference). In multivariable analysis, the only variables associated with emergency Cesarean delivery were maternal age (<jats:styled-content style=\"fixed-case\">aOR<\/jats:styled-content>, 1.07 (95%\u2009<jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content>, 1.00\u20131.13)), body mass index (<jats:styled-content style=\"fixed-case\">BMI<\/jats:styled-content>) (<jats:styled-content style=\"fixed-case\">aOR<\/jats:styled-content>, 3.99 (95%\u2009<jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content>, 1.07\u201314.9) for <jats:styled-content style=\"fixed-case\">BMI<\/jats:styled-content> 20\u201323\u2009kg\/m<jats:sup>2<\/jats:sup>; 5.04 (95%\u2009<jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content>, 1.34\u201319.03) for <jats:styled-content style=\"fixed-case\">BMI<\/jats:styled-content> 24\u201328\u2009kg\/m<jats:sup>2<\/jats:sup>; and 3.1 (95%\u2009<jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content>, 0.65\u201314.78) for <jats:styled-content style=\"fixed-case\">BMI<\/jats:styled-content>\u2009&gt;\u200928\u2009kg\/m<jats:sup>2<\/jats:sup>) and induction of labor (<jats:styled-content style=\"fixed-case\">aOR<\/jats:styled-content>, 1.92 (95%\u2009<jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content>, 1.05\u20133.5)).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>In nulliparous women with a twin pregnancy, second\u2010trimester <jats:styled-content style=\"fixed-case\">CL<\/jats:styled-content> is not associated with risk of emergency Cesarean delivery. Copyright \u00a9 2014 ISUOG. Published by John Wiley &amp; Sons Ltd.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.14727","type":"journal-article","created":{"date-parts":[[2014,11,17]],"date-time":"2014-11-17T14:59:48Z","timestamp":1416236388000},"page":"579-584","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":2,"title":["Second\u2010trimester cervical length as risk indicator for Cesarean delivery in women with twin pregnancy"],"prefix":"10.1002","volume":"46","author":[{"given":"L.","family":"van de Mheen","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynaecology VU University Medical Centre Amsterdam  Amsterdam The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E.","family":"Schuit","sequence":"additional","affiliation":[{"name":"Julius Centre for Health Sciences and Primary Care University Medical Centre Utrecht  Utrecht The Netherlands"},{"name":"Department of Obstetrics and Gynaecology Academic Medical Centre, Amsterdam  The Netherlands"},{"name":"Stanford Prevention Research Center Stanford University  Stanford CA USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S. M. S.","family":"Liem","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Academic Medical Centre, Amsterdam  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"A. C.","family":"Lim","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Academic Medical Centre, Amsterdam  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"D. J.","family":"Bekedam","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Onze Lieve Vrouwe Gasthuis  Amsterdam The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"S. M. T. A.","family":"Goossens","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Maastricht University Medical Centre  Maastricht The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. T. M.","family":"Franssen","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology University Medical Centre Groningen  Groningen The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. M.","family":"Porath","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Maxima Medical Centre, Veldhoven  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. A.","family":"Oudijk","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology University Medical Centre Utrecht  Utrecht The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"K. W. M.","family":"Bloemenkamp","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Leiden University Medical Centre  Leiden The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. J.","family":"Duvekot","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Erasmus Medical Centre, Rotterdam  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. D.","family":"Woiski","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Radboud University Medical Centre, Nijmegen  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"I.","family":"de Graaf","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Academic Medical Centre, Amsterdam  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J. M.","family":"Sikkema","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Zorggroep Twente, Almelo  The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"H. C. J.","family":"Scheepers","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Onze Lieve Vrouwe Gasthuis  Amsterdam The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"J.","family":"van Eijk","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology Isala Clinics Zwolle  Zwolle The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"C. J. M.","family":"de Groot","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and Gynaecology VU University Medical Centre Amsterdam  Amsterdam The Netherlands"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"M. G.","family":"van Pampus","sequence":"additional","affiliation":[{"name":"Stanford Prevention Research Center Stanford University  Stanford CA USA"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"B. W. 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