{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,3]],"date-time":"2026-07-03T22:57:10Z","timestamp":1783119430442,"version":"3.54.6"},"reference-count":9,"publisher":"Wiley","issue":"4","license":[{"start":{"date-parts":[[2012,11,21]],"date-time":"2012-11-21T00:00:00Z","timestamp":1353456000000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Birth"],"published-print":{"date-parts":[[2012,12]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The Landon et al and the Crowther et al papers are both prospective trials comparing planned vaginal birth after a previous cesarean section (<jats:styled-content style=\"fixed-case\">VBAC<\/jats:styled-content>) with elective cesarean section in women eligible for a trial of labor. With 33,000 women, the cohort studied by Landon et al in conjunction with the National Institute of Child Health and Human Development (<jats:styled-content style=\"fixed-case\">NICHHD<\/jats:styled-content>) spawned multiple publications, giving estimates of <jats:styled-content style=\"fixed-case\">VBAC<\/jats:styled-content> risks and success relevant to women in a wide variety of clinical situations. Data abstraction was careful and outcomes were hard and verified. With 2,300 women, the study by Crowther et al, was 6 percent the size of the Landon\u2010<jats:styled-content style=\"fixed-case\">NICHHD<\/jats:styled-content> study. Although it claimed \u201cincreased risk of both <jats:bold>fetal death<\/jats:bold> or liveborn <jats:bold>infant death<\/jats:bold> prior to discharge or serious infant outcome,\u201d there were only 2 perinatal deaths\u2014both stillbirths prior to 39\u00a0weeks' gestation and unrelated to mode of delivery. Of the 28 infants with \u201cserious neonatal morbidity,\u201d only three could have resulted from uterine rupture; prior experience with this outcome indicates all three will likely escape long\u2010term morbidity. Pseudorandomization and erroneous adherence to an intention\u2010to\u2010treat principle seriously hinder the study's internal validity, attributing outcomes for one quarter of women undergoing elective cesarean section to the planned <jats:styled-content style=\"fixed-case\">VBAC<\/jats:styled-content> group. The study by Landon and <jats:styled-content style=\"fixed-case\">NICHHD<\/jats:styled-content> is over 10 times larger and of much higher quality than the study by Crowther et al. The Landon\u2010<jats:styled-content style=\"fixed-case\">NICHHD<\/jats:styled-content> publications should be used to help women make decisions about planned mode of delivery after cesarean. (<jats:styled-content style=\"fixed-case\">BIRTH<\/jats:styled-content> 39:4 December 2012)<\/jats:p>","DOI":"10.1111\/birt.12014","type":"journal-article","created":{"date-parts":[[2012,11,21]],"date-time":"2012-11-21T19:22:42Z","timestamp":1353525762000},"page":"333-337","source":"Crossref","is-referenced-by-count":2,"title":["Quantifying <scp>VBAC<\/scp> Risk: Muddying the Waters"],"prefix":"10.1111","volume":"39","author":[{"given":"Andrew","family":"Kotaska","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology Stanton Territorial Hospital Yellowknife Northwest Territories"},{"name":"University of Manitoba Winnipeg Manitoba"},{"name":"University of British Columbia Vancouver Canada"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"311","published-online":{"date-parts":[[2012,11,21]]},"reference":[{"key":"e_1_2_7_2_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJM200107053450101"},{"key":"e_1_2_7_3_1","doi-asserted-by":"publisher","DOI":"10.1056\/NEJMoa040405"},{"key":"e_1_2_7_4_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000254169.49346.e9"},{"key":"e_1_2_7_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2005.05.066"},{"key":"e_1_2_7_6_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000224694.32531.f3"},{"key":"e_1_2_7_7_1","doi-asserted-by":"publisher","DOI":"10.1097\/01.AOG.0000284622.71222.b2"},{"key":"e_1_2_7_8_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0140-6736(00)02840-3"},{"key":"e_1_2_7_9_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ajog.2004.06.056"},{"key":"e_1_2_7_10_1","doi-asserted-by":"publisher","DOI":"10.1046\/j.0905-6157.2003.00101.x"}],"container-title":["Birth"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/api.wiley.com\/onlinelibrary\/tdm\/v1\/articles\/10.1111%2Fbirt.12014","content-type":"unspecified","content-version":"vor","intended-application":"text-mining"},{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/pdf\/10.1111\/birt.12014","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2023,11,21]],"date-time":"2023-11-21T05:43:13Z","timestamp":1700545393000},"score":1,"resource":{"primary":{"URL":"https:\/\/onlinelibrary.wiley.com\/doi\/10.1111\/birt.12014"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2012,11,21]]},"references-count":9,"journal-issue":{"issue":"4","published-print":{"date-parts":[[2012,12]]}},"alternative-id":["10.1111\/birt.12014"],"URL":"https:\/\/doi.org\/10.1111\/birt.12014","archive":["Portico"],"relation":{},"ISSN":["0730-7659","1523-536X"],"issn-type":[{"value":"0730-7659","type":"print"},{"value":"1523-536X","type":"electronic"}],"subject":[],"published":{"date-parts":[[2012,11,21]]}}}