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• W2014149750 abstract "ObjectiveWhile it is apparent that maternal BMI varies greatly by ethnicity, we were interested to see if these ethnic variations affect the validity of using a national reference nomogram for newborn birthweight.Study designThe clinical database for Gouverneur Health Care Services, a clinic serving a largely immigrant population, was queried for all deliveries occurring from November 2002 through June 2006. The ethnic groups of interest were Chinese and Hispanic women who delivered >=36 weeks gestation. Only foreign-born women were included in an attempt to minimize heterogeneity. Subjects were stratified by gestational age at delivery for the analyses.ResultsThe query yielded 1876 Chinese and 1401 foreign-born Hispanic pregnancies. The mean maternal pre-gravid BMI was significantly lower in the Chinese group (20.8 vs 26.3, p<0.001). There was a poor correlation between BMI and birthweight for each ethnic group (Chinese-0.19; Hispanic-0.11). Wilcoxon rank sum test analysis showed statistically significant variations in birthweight distribution for 38, 39 and 40 weeks; however, these were clinically insignificant as the medians and 10th and 90th percentiles were all within 100gms. In addition, when comparing our >=37 weeks deliveries to a national reference standard (Alexander et al. 1999), there was no significant difference between the proportion of Chinese vs Hispanic birthweights that were below the 10th percentile at any gestational age. In fact, at 36 weeks, a higher percentage of Hispanic births were below the 10th percentile compared to Chinese births (20% vs 4.3%, p=0.03).ConclusionThere is no clinically significant divergence in the distribution of neonatal birthweight between Chinese and Hispanic immigrants. National reference birthweight nomograms are equally applied to both groups to define a small-for-gestational-age fetus. Assuming a constitutionally small fetus based on ethnicity and BMI should be avoided and appropriate surveillance should be implemented. ObjectiveWhile it is apparent that maternal BMI varies greatly by ethnicity, we were interested to see if these ethnic variations affect the validity of using a national reference nomogram for newborn birthweight. While it is apparent that maternal BMI varies greatly by ethnicity, we were interested to see if these ethnic variations affect the validity of using a national reference nomogram for newborn birthweight. Study designThe clinical database for Gouverneur Health Care Services, a clinic serving a largely immigrant population, was queried for all deliveries occurring from November 2002 through June 2006. The ethnic groups of interest were Chinese and Hispanic women who delivered >=36 weeks gestation. Only foreign-born women were included in an attempt to minimize heterogeneity. Subjects were stratified by gestational age at delivery for the analyses. The clinical database for Gouverneur Health Care Services, a clinic serving a largely immigrant population, was queried for all deliveries occurring from November 2002 through June 2006. The ethnic groups of interest were Chinese and Hispanic women who delivered >=36 weeks gestation. Only foreign-born women were included in an attempt to minimize heterogeneity. Subjects were stratified by gestational age at delivery for the analyses. ResultsThe query yielded 1876 Chinese and 1401 foreign-born Hispanic pregnancies. The mean maternal pre-gravid BMI was significantly lower in the Chinese group (20.8 vs 26.3, p<0.001). There was a poor correlation between BMI and birthweight for each ethnic group (Chinese-0.19; Hispanic-0.11). Wilcoxon rank sum test analysis showed statistically significant variations in birthweight distribution for 38, 39 and 40 weeks; however, these were clinically insignificant as the medians and 10th and 90th percentiles were all within 100gms. In addition, when comparing our >=37 weeks deliveries to a national reference standard (Alexander et al. 1999), there was no significant difference between the proportion of Chinese vs Hispanic birthweights that were below the 10th percentile at any gestational age. In fact, at 36 weeks, a higher percentage of Hispanic births were below the 10th percentile compared to Chinese births (20% vs 4.3%, p=0.03). The query yielded 1876 Chinese and 1401 foreign-born Hispanic pregnancies. The mean maternal pre-gravid BMI was significantly lower in the Chinese group (20.8 vs 26.3, p<0.001). There was a poor correlation between BMI and birthweight for each ethnic group (Chinese-0.19; Hispanic-0.11). Wilcoxon rank sum test analysis showed statistically significant variations in birthweight distribution for 38, 39 and 40 weeks; however, these were clinically insignificant as the medians and 10th and 90th percentiles were all within 100gms. In addition, when comparing our >=37 weeks deliveries to a national reference standard (Alexander et al. 1999), there was no significant difference between the proportion of Chinese vs Hispanic birthweights that were below the 10th percentile at any gestational age. In fact, at 36 weeks, a higher percentage of Hispanic births were below the 10th percentile compared to Chinese births (20% vs 4.3%, p=0.03). ConclusionThere is no clinically significant divergence in the distribution of neonatal birthweight between Chinese and Hispanic immigrants. National reference birthweight nomograms are equally applied to both groups to define a small-for-gestational-age fetus. Assuming a constitutionally small fetus based on ethnicity and BMI should be avoided and appropriate surveillance should be implemented. There is no clinically significant divergence in the distribution of neonatal birthweight between Chinese and Hispanic immigrants. National reference birthweight nomograms are equally applied to both groups to define a small-for-gestational-age fetus. Assuming a constitutionally small fetus based on ethnicity and BMI should be avoided and appropriate surveillance should be implemented." @default.
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• W2014149750 date "2007-12-01" @default.
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• W2014149750 title "536: The validity of a national reference birthweight nomogram for asian and hispanic women" @default.
• W2014149750 doi "https://doi.org/10.1016/j.ajog.2007.10.538" @default.
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