{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,4,29]],"date-time":"2026-04-29T21:10:54Z","timestamp":1777497054447,"version":"3.51.4"},"reference-count":37,"publisher":"Wiley","issue":"13","license":[{"start":{"date-parts":[[2013,7,17]],"date-time":"2013-07-17T00:00:00Z","timestamp":1374019200000},"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":["BJOG"],"published-print":{"date-parts":[[2013,12]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p>To determine whether the recently published <jats:italic>A global reference for fetal\u2010weight and birthweight percentiles<\/jats:italic> (Global Reference) improves small\u2010 (<jats:styled-content style=\"fixed-case\">SGA<\/jats:styled-content>), appropriate\u2010 (<jats:styled-content style=\"fixed-case\">AGA<\/jats:styled-content>), and large\u2010for\u2010gestational\u2010age (<jats:styled-content style=\"fixed-case\">LGA<\/jats:styled-content>) definitions in predicting infant mortality.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p>Population\u2010based cohort study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting<\/jats:title><jats:p>The <jats:styled-content style=\"fixed-case\">US<\/jats:styled-content> Linked Livebirth and Infant Death records between 1995 and 2004.<\/jats:p><\/jats:sec><jats:sec><jats:title>Population<\/jats:title><jats:p>Singleton births with birthweight &gt;500\u00a0g born at 24\u201341\u00a0weeks of gestation.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>We compared infant mortality rates of <jats:styled-content style=\"fixed-case\">SGA<\/jats:styled-content>,<jats:styled-content style=\"fixed-case\"> AGA<\/jats:styled-content>, and <jats:styled-content style=\"fixed-case\">LGA<\/jats:styled-content> infants classified by three different references: the Global Reference; a commonly used birthweight reference; and Hadlock's ultrasound reference.<\/jats:p><\/jats:sec><jats:sec><jats:title>Main outcome measures<\/jats:title><jats:p>Infant mortality rates.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>Among 33\u00a0997\u00a0719 eligible liveborn singleton births, 25% of preterm and 9% of term infants were classified differently for <jats:styled-content style=\"fixed-case\">SGA<\/jats:styled-content>,<jats:styled-content style=\"fixed-case\"> AGA<\/jats:styled-content>, and <jats:styled-content style=\"fixed-case\">LGA<\/jats:styled-content> by the Global Reference and the birthweight reference. The Global Reference indicated higher mortality rates in preterm <jats:styled-content style=\"fixed-case\">SGA<\/jats:styled-content> and preterm <jats:styled-content style=\"fixed-case\">LGA<\/jats:styled-content> infants than the birthweight reference. The mortality rate was considerably higher in infants classified as preterm <jats:styled-content style=\"fixed-case\">SGA<\/jats:styled-content> by the Global Reference but not by the birthweight reference, compared with the corresponding infants classified by the birthweight reference but not by the Global Reference (105.7 versus 12.9 per 1000, <jats:styled-content style=\"fixed-case\">RR<\/jats:styled-content> 8.17, 95%\u00a0<jats:styled-content style=\"fixed-case\">CI<\/jats:styled-content> 7.38\u20139.06). Yet, the differences in mortality rates were much smaller in term infants than in preterm infants. Black infants had a particularly higher mortality rate than other races in <jats:styled-content style=\"fixed-case\">AGA<\/jats:styled-content> and <jats:styled-content style=\"fixed-case\">LGA<\/jats:styled-content> preterm and term infants.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>In respect to the commonly used birthweight reference, the Global Reference increases the identification of infant deaths by improved classification of abnormal newborn size at birth, and these advantages were more obvious in preterm than in term infants.<\/jats:p><\/jats:sec>","DOI":"10.1111\/1471-0528.12381","type":"journal-article","created":{"date-parts":[[2013,7,17]],"date-time":"2013-07-17T09:59:58Z","timestamp":1374055198000},"page":"1613-1621","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":43,"title":["Application of <i>A global reference for fetal\u2010weight and birthweight percentiles<\/i> in 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