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- W2107733936 abstract "We examined how customized birth-weight standards compare to population birth-weight references at term (> or =37 weeks), nearly term (34-36 weeks), moderately preterm (32-33 weeks) and for the very preterm births (28-31 weeks), with respect to perinatal mortality.Data from the national Swedish Medical Births Register for the years 1992-2001, consisting of a total of 783,303 singletons born at or after 28 completed gestational weeks. Infants were classified as small for gestational age (SGA, <10th centile) according to a conventional population based birth-weight reference and a customized standard. Risk ratios (RR) for still birth and neonatal death were compared between standards by prematurity of the birth. Diagnostic performance measures of specificity, sensitivity and positive and negative predictive values were also evaluated.More than half, 59% (209), of the 355 infants still-born between 28 and 31 weeks gestation were classified as SGA by the customized standard, but only 23% (80), were so classified as SGA by the population reference. However, only 14% (95%CI 13-16) of the 1461 very preterm infants classified as SGA by the customized standard were still-born, compared to 23% (95%CI 19-28) of the 348 infants classified as SGA by the population reference. Therefore, the relative risk of still birth for those classified as SGA by the customized standard is lower, 2.02 (95%CI: 1.65, 2.46), than for the population reference 2.64 (95%CI: 2.11, 3.30). Similar results were observed for the risk of neonatal death. For term weeks, customized standards showed stronger relationships than population references (RR: 4.30 (95%CI 3.82, 4.84) vs. 4.00 (95%CI 3.55, 4.51) for still births).Customized standards categorize a higher absolute number of preterm infants who are still-born as SGA. However, infants classified as SGA by population references are at higher risk of perinatal mortality than infants classified as SGA by customized standards." @default.
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- W2107733936 date "2009-09-01" @default.
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- W2107733936 title "A comparison of customized and population-based birth-weight standards: The influence of gestational age" @default.
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- W2107733936 doi "https://doi.org/10.1016/j.ejogrb.2009.05.033" @default.
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