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• W2041045021 abstract "ObjectiveThe World Health Organization (WHO) has established that a population-based curve should be used as birthweight standard (Williams et al). This study was designed to (a) create a birthweight curve based on a mostly Hispanic population, (b) assign perinatal risks according to birthweight, and (c) compare with the standard proposed by WHO.Study designA national birthweight-for-gestational age curve (smoothed) was constructed including all singleton deliveries that occurred in Chile from 1993 to 2000. Perinatal mortality was calculated for birthweight intervals. A comparison with an international standard (Williams's curve) was performed.ResultsA national curve was constructed with 2,055,879 singleton deliveries. During the year 2000 (246,930 deliveries), the perinatal mortality (×1000 live births) according to percentile intervals of this curve was 118.8 (p2); 41.3 (p2-5); 20.8 (p5-10); 11.9 (p10-25); 6.15 (p25-50); 4.79 (p50-75); 4.27 (p75-90); 5.26 (p90); and 10.17 (total). Comparing the 10th percentile of both curves (present and William's) the median difference after 26 weeks was 42 g (2-77), See graph (Chilean, open squares; William's, open triangles). Maternal, perinatal, and infant mortality were 18.7 (×100,000), 8.6 (×1000), and 8.9 (×1000), respectively, for this period.ConclusionPerinatal mortality increased dramatically when birthweight fell below the 5th percentile for this population. Under comparable perinatal health indices, there are no differences between this predominantly Hispanic curve and the standard proposed by WHO. ObjectiveThe World Health Organization (WHO) has established that a population-based curve should be used as birthweight standard (Williams et al). This study was designed to (a) create a birthweight curve based on a mostly Hispanic population, (b) assign perinatal risks according to birthweight, and (c) compare with the standard proposed by WHO. The World Health Organization (WHO) has established that a population-based curve should be used as birthweight standard (Williams et al). This study was designed to (a) create a birthweight curve based on a mostly Hispanic population, (b) assign perinatal risks according to birthweight, and (c) compare with the standard proposed by WHO. Study designA national birthweight-for-gestational age curve (smoothed) was constructed including all singleton deliveries that occurred in Chile from 1993 to 2000. Perinatal mortality was calculated for birthweight intervals. A comparison with an international standard (Williams's curve) was performed. A national birthweight-for-gestational age curve (smoothed) was constructed including all singleton deliveries that occurred in Chile from 1993 to 2000. Perinatal mortality was calculated for birthweight intervals. A comparison with an international standard (Williams's curve) was performed. ResultsA national curve was constructed with 2,055,879 singleton deliveries. During the year 2000 (246,930 deliveries), the perinatal mortality (×1000 live births) according to percentile intervals of this curve was 118.8 (p2); 41.3 (p2-5); 20.8 (p5-10); 11.9 (p10-25); 6.15 (p25-50); 4.79 (p50-75); 4.27 (p75-90); 5.26 (p90); and 10.17 (total). Comparing the 10th percentile of both curves (present and William's) the median difference after 26 weeks was 42 g (2-77), See graph (Chilean, open squares; William's, open triangles). Maternal, perinatal, and infant mortality were 18.7 (×100,000), 8.6 (×1000), and 8.9 (×1000), respectively, for this period. A national curve was constructed with 2,055,879 singleton deliveries. During the year 2000 (246,930 deliveries), the perinatal mortality (×1000 live births) according to percentile intervals of this curve was 118.8 (p2); 41.3 (p2-5); 20.8 (p5-10); 11.9 (p10-25); 6.15 (p25-50); 4.79 (p50-75); 4.27 (p75-90); 5.26 (p90); and 10.17 (total). Comparing the 10th percentile of both curves (present and William's) the median difference after 26 weeks was 42 g (2-77), See graph (Chilean, open squares; William's, open triangles). Maternal, perinatal, and infant mortality were 18.7 (×100,000), 8.6 (×1000), and 8.9 (×1000), respectively, for this period. ConclusionPerinatal mortality increased dramatically when birthweight fell below the 5th percentile for this population. Under comparable perinatal health indices, there are no differences between this predominantly Hispanic curve and the standard proposed by WHO. Perinatal mortality increased dramatically when birthweight fell below the 5th percentile for this population. Under comparable perinatal health indices, there are no differences between this predominantly Hispanic curve and the standard proposed by WHO." @default.
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• W2041045021 date "2003-12-01" @default.
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• W2041045021 title "Race is not relevant for birthweight distribution when health indices are comparable" @default.
• W2041045021 doi "https://doi.org/10.1016/j.ajog.2003.10.370" @default.
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