{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,22]],"date-time":"2026-07-22T22:19:52Z","timestamp":1784758792908,"version":"3.55.0"},"reference-count":33,"publisher":"Wiley","issue":"1","license":[{"start":{"date-parts":[[2013,8,12]],"date-time":"2013-08-12T00:00:00Z","timestamp":1376265600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J of Obstet and Gynaecol"],"published-print":{"date-parts":[[2014,1]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:sec><jats:title>Aim<\/jats:title><jats:p>To examine the relationship between preterm birth and socioeconomic factors, past history, cervical length, cervical interleukin\u20108, bacterial vaginosis, underlying diseases, use of medication, employment status, sex of the fetus and multiple pregnancy.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In a multicenter, prospective, observational study, 1810 <jats:styled-content style=\"fixed-case\">J<\/jats:styled-content>apanese women registering their future delivery were enrolled at 8<jats:sup>+0<\/jats:sup> to 12<jats:sup>+6<\/jats:sup> weeks of gestation. Data on cervical length and delivery were obtained from 1365 pregnant women. Multivariate logistic regression analysis was performed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Short cervical length, steroid use, multiple pregnancy and male fetus were risk factors for preterm birth before 34 weeks of gestation. Multiple pregnancy, low educational level, short cervical length and part\u2010timer were risk factors for preterm birth before 37 weeks of gestation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p>Multiple pregnancy and cervical shortening at 20\u201324 weeks of gestation was a stronger risk factor for preterm birth. Any pregnant woman being part\u2010time employee or low educational level, having a male fetus and requiring steroid treatment should be watched for the development of preterm birth.<\/jats:p><\/jats:sec>","DOI":"10.1111\/jog.12120","type":"journal-article","created":{"date-parts":[[2013,8,13]],"date-time":"2013-08-13T04:41:25Z","timestamp":1376368885000},"page":"53-61","source":"Crossref","is-referenced-by-count":26,"title":["Multiple pregnancy, short cervix, part\u2010time worker, steroid use, low educational level and male fetus are risk factors for preterm birth in <scp>J<\/scp>apan: A multicenter, prospective study"],"prefix":"10.1111","volume":"40","author":[{"given":"Arihiro","family":"Shiozaki","sequence":"first","affiliation":[{"name":"Department of Obstetrics and Gynecology University of Toyama  Toyama"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Satoshi","family":"Yoneda","sequence":"additional","affiliation":[{"name":"Department of Obstetrics and 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