{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2022,4,4]],"date-time":"2022-04-04T20:05:36Z","timestamp":1649102736159},"reference-count":11,"publisher":"Cambridge University Press (CUP)","issue":"1","license":[{"start":{"date-parts":[[2020,4,6]],"date-time":"2020-04-06T00:00:00Z","timestamp":1586131200000},"content-version":"unspecified","delay-in-days":65,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Twin Res Hum Genet"],"published-print":{"date-parts":[[2020,2]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Using vital statistics in Japan (1995\u20132008), 154,578 live-born twin pairs (128,236 monozygotic [MZ] and 180,920 dizygotic [DZ]) were identified. The proportion of severe discordance among live-born twin births was twice as high in Japanese than Caucasian infants. There were 1858 MZ and 1620 DZ infant deaths. Computation of the relationship between infant mortality rate and birth weight discordance among the twins was performed. Discordance levels were classified into seven groups: &lt;5%, five groups from 5\u20139% to 25\u201329%, and \u226530%.The mortality rate was significantly higher in MZ than DZ twins for discordances except at 5\u20139% and 10\u201314%. The lowest rate for MZ twins was at 5\u20139% (7.5 per 1000 live twins) and significantly increased from 10\u201314% (9.4) to \u226530% (83.4), while the lowest rate for DZ twins was at &lt;5% (6.7), which significantly increased at 10\u201314% (8.0) and from 25\u201329% (12.1) to \u226530% (35.5). The relationship was also computed in two gestational age groups (&lt;28 and \u226528 weeks). For births at &lt;28 weeks, three discordances (after 20\u201324%) in MZ twins were associated with adverse mortality rate. For births at \u226528 weeks, the same relationship was obtained after 10\u201314% in MZ and after 20\u201324% in DZ twins. The relationship from 2002 to 2008 showed that the mortality rates significantly increased after 10\u201314% for both types of twins. In conclusion, five discordance levels in MZ and three levels in DZ twins were associated with adverse mortality rates.<\/jats:p>","DOI":"10.1017\/thg.2020.8","type":"journal-article","created":{"date-parts":[[2020,4,6]],"date-time":"2020-04-06T08:22:23Z","timestamp":1586161343000},"page":"55-60","source":"Crossref","is-referenced-by-count":0,"title":["The Relationship between Birth Weight Discordance and Adverse Infant Mortality among Monozygotic and Dizygotic Twins in Japan, 1995\u20132008"],"prefix":"10.1017","volume":"23","author":[{"given":"Yoko","family":"Imaizumi","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"56","published-online":{"date-parts":[[2020,4,6]]},"reference":[{"key":"S1832427420000080_ref11","first-page":"346","article-title":"Beitrage zu Physiologie und Pathologie der Mehrlingsgeburten beim Menschen","volume":"88","author":"Weinberg","year":"1901","journal-title":"Archiv fuer die gesamte Physiolgie des Menschen und der Tiere"},{"key":"S1832427420000080_ref2","first-page":"570","article-title":"The effect of birth weight discordance on twin neonatal mortality","volume":"101","author":"Branum","year":"2003","journal-title":"Obstetrics and Gynecology"},{"key":"S1832427420000080_ref1","doi-asserted-by":"publisher","DOI":"10.1375\/136905203322686536"},{"key":"S1832427420000080_ref4","first-page":"341","article-title":"Infant mortality of zygotic twins and influencing factors in Japan, 1995\u20132008","volume":"5","author":"Imaizumi","year":"2015","journal-title":"Gynecology and Obstetrics"},{"key":"S1832427420000080_ref7","doi-asserted-by":"crossref","first-page":"969","DOI":"10.1055\/s-0038-1675769","article-title":"Association between the degree of twin birthweight discordance and perinatal outcomes","volume":"36","author":"Kim","year":"2019","journal-title":"American Journal of Perinatology"},{"key":"S1832427420000080_ref10","doi-asserted-by":"publisher","DOI":"10.1375\/twin.13.5.490"},{"key":"S1832427420000080_ref8","first-page":"391","article-title":"Twin birth weight discordance: Associated factors and outcome","volume":"20","author":"Mazhar","year":"2010","journal-title":"Journal of the College of Physicians and Surgeons Pakistan"},{"key":"S1832427420000080_ref5","doi-asserted-by":"publisher","DOI":"10.1515\/jpm-2016-0089"},{"key":"S1832427420000080_ref9","first-page":"282","article-title":"Fetoscopic laser photocoagulation for TTTS (in Japanese)","volume":"60","author":"Sago","year":"2008","journal-title":"Ninsanpushi"},{"key":"S1832427420000080_ref6","doi-asserted-by":"publisher","DOI":"10.1375\/twin.9.2.292"},{"key":"S1832427420000080_ref3","first-page":"474","article-title":"Fetal and neonatal mortality among twin gestations in the United States: The role of intrapair birthweight discordance","volume":"100","author":"Demissie","year":"2002","journal-title":"Obstetrics and Gynecology"}],"container-title":["Twin Research and Human Genetics"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.cambridge.org\/core\/services\/aop-cambridge-core\/content\/view\/S1832427420000080","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,1,19]],"date-time":"2022-01-19T10:45:07Z","timestamp":1642589107000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.cambridge.org\/core\/product\/identifier\/S1832427420000080\/type\/journal_article"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2020,2]]},"references-count":11,"journal-issue":{"issue":"1","published-print":{"date-parts":[[2020,2]]}},"alternative-id":["S1832427420000080"],"URL":"https:\/\/doi.org\/10.1017\/thg.2020.8","relation":{},"ISSN":["1832-4274","1839-2628"],"issn-type":[{"value":"1832-4274","type":"print"},{"value":"1839-2628","type":"electronic"}],"subject":[],"published":{"date-parts":[[2020,2]]}}}