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- W4235460913 abstract "Sonographic estimation of fetal weight (EFW) is important in the management of high risk pregnancies. The possibility that increased maternal BMI adversely affects EFW assessments in twin pregnancies is controversial. This aim was to investigate the effect of maternal BMI on accuracy of EFW assessments in twin gestations prospectively recruited for the ESPRiT (Evaluation of Sonographic Predictors of Restricted growth In Twins) study, carried out by the Perinatal Ireland research consortium. 1001 twin pair pregnancies were recruited. After exclusion (miscarriage, stillbirth, EFW not available) BMI (at 16-24 weeks), birthweights, and ultrasound determination of EFW (within 2 weeks of delivery) were available for 943 twin pairs. The accuracy of EFW determination was defined as the difference between EFW and actual birthweight for either twin (absolute and % difference). Regression analysis was used to model the data which were log-transformed to meet normality assumptions. The chi-square test was used for categorizations of BMI. Secondarily, cells with < 5% of the population were combined for analysis resulting in the following three categories: 1.Normal/Underweight; 2 Overweight; and 3.Obese/Extremely Obese. The mean maternal age was 33 years and mean gestation at delivery was 36 weeks. The BMI details are shown in Table 1. Regression analysis showed no linear or log-linear relationship between BMI and accuracy of EFW (P value for absolute difference=0.11, P value for percentage difference=0.27). This was true for EFW accuracy for both presenting and non-presenting twins. Analysis revealed mean absolute variation values of 184 grams (8.0%) in the normal / underweight group (n=531), 196 grams (8.5%) in the overweight group (n=278) and 206 grams (8.6%) in the obese/ extremely obese group (n=134)(P= 0.028).Tabled 1Frequency of BMI categories Contrary to a commonly held clinical impression, increasing maternal BMI has no significant impact on the accuracy of EFW estimations in twin pregnancy. (Funded by HRB Ireland.)" @default.
- W4235460913 created "2022-05-12" @default.
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- W4235460913 date "2013-01-01" @default.
- W4235460913 modified "2023-10-18" @default.
- W4235460913 title "534: The influence of maternal body mass index on fetal weight estimation in twin pregnancy" @default.
- W4235460913 doi "https://doi.org/10.1016/j.ajog.2012.10.700" @default.
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