{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,3]],"date-time":"2026-05-03T14:53:33Z","timestamp":1777820013364,"version":"3.51.4"},"reference-count":34,"publisher":"Wiley","issue":"3","license":[{"start":{"date-parts":[[2006,6,30]],"date-time":"2006-06-30T00:00:00Z","timestamp":1151625600000},"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":[[2006,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Objectives<\/jats:title><jats:p>To determine the ability of Bishop score and sonographic cervical length to predict time to spontaneous onset of labor and time to delivery in prolonged pregnancy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>Ninety\u2010seven women underwent transvaginal ultrasound examination and palpation of the cervix at 291\u2013296 days' gestation according to ultrasound fetometry at 12\u201320 weeks' gestation. Sonographic cervical length and Bishop score were recorded. Multivariate logistic regression analysis was used to determine which variables were independent predictors of the onset of labor\/delivery \u2264 24 h, \u2264 48 h, and \u2264 96 h. Receiver\u2013operating characteristics (ROC) curves were drawn to assess diagnostic performance.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In nulliparous women (<jats:italic>n<\/jats:italic> = 45), both Bishop score and sonographic cervical length predicted the onset of labor\/delivery \u2264 24 h and \u2264 48 h (area under ROC curve for the onset of labor \u2264 24 h 0.79 vs. 0.80, <jats:italic>P<\/jats:italic> = 0.94; for delivery \u2264 24 h 0.81 vs. 0.85, <jats:italic>P<\/jats:italic> = 0.64; for the onset of labor \u2264 48 h 0.73 vs. 0.74, <jats:italic>P<\/jats:italic> = 0.90; for delivery \u2264 48 h 0.77 vs. 0.71, <jats:italic>P<\/jats:italic> = 0.50). Only Bishop score discriminated between nulliparous women who went into labor\/delivered \u2264 96 h or &gt; 96 h. A logistic regression model including Bishop score and cervical length was superior to Bishop score alone in predicting delivery \u2264 24 h (area under ROC curve 0.93 vs. 0.81, <jats:italic>P<\/jats:italic> = 0.03) and superior to Bishop score alone and cervical length alone in predicting the onset of labor \u2264 24 h (area under ROC curve 0.90 vs. 0.79, <jats:italic>P<\/jats:italic> = 0.06; and 0.90 vs. 0.80, <jats:italic>P<\/jats:italic> = 0.06). In parous women (<jats:italic>n<\/jats:italic> = 52), Bishop score and sonographic cervical length predicted the onset of labor\/delivery \u2264 24 h (area under ROC curve for the onset of labor 0.75 vs. 0.69, <jats:italic>P<\/jats:italic> = 0.49; for delivery 0.74 vs. 0.70, <jats:italic>P<\/jats:italic> = 0.62), but only Bishop score discriminated between women who went into labor\/delivered \u2264 48 h and &gt; 48 h. Three parous women had not gone into labor and six had not given birth at 96 h. In parous women logistic regression models including both Bishop score and cervical length did not substantially improve prediction of the time to onset of labor\/delivery.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In prolonged pregnancy Bishop score and sonographic cervical length have a similar ability to predict the time to the onset of labor and delivery. In nulliparous women the use of logistic regression models including Bishop score and cervical length is likely to offer better prediction of the onset of labor\/delivery \u2264 24 h than the use of the Bishop score alone. Copyright \u00a9 2006 ISUOG. Published by John Wiley &amp; Sons, Ltd.<\/jats:p><\/jats:sec>","DOI":"10.1002\/uog.2746","type":"journal-article","created":{"date-parts":[[2006,6,30]],"date-time":"2006-06-30T21:13:00Z","timestamp":1151701980000},"page":"298-305","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":46,"title":["Bishop score and ultrasound assessment of the cervix for prediction of time to onset of labor and time to delivery in prolonged pregnancy"],"prefix":"10.1002","volume":"28","author":[{"given":"E.","family":"Strobel","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"P.","family":"Sladkevicius","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L.","family":"Rovas","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"F.","family":"De Smet","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"E. Dejin","family":"Karlsson","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"L.","family":"Valentin","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2006,6,30]]},"reference":[{"key":"e_1_2_7_2_2","first-page":"247","article-title":"Recommended definition terminology and format for statistical tables related to the perinatal period and rise of a new certification for cause of perinatal deaths. 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