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Macrosomia: a new formula for optimized fetal weight estimation

Objectives To develop and test a specific formula for estimating weight in the macrosomic fetus. Methods Ultrasound estimations of fetal weight were carried out within 1 week of delivery in 424 singleton fetuses with a birth weight of ≥ 4000 g. Exclusion criteria were multiple pregnancy, intrauterin...

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Hauptverfasser: Hart, Nicola Caroline (VerfasserIn) , Hilbert, A. (VerfasserIn) , Meurer, B. (VerfasserIn) , Schrauder, M. (VerfasserIn) , Schmid, M. (VerfasserIn) , Siemer, Jörn (VerfasserIn) , Voigt, M. (VerfasserIn) , Schild, R. L. (VerfasserIn)
Dokumenttyp: Article (Journal)
Sprache:Englisch
Veröffentlicht: [January 2010]
In: Ultrasound in obstetrics & gynecology
Year: 2010, Jahrgang: 35, Heft: 1, Pages: 42-47
ISSN:1469-0705
DOI:10.1002/uog.7493
Online-Zugang:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1002/uog.7493
Verlag, lizenzpflichtig, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1002/uog.7493
Volltext
Verfasserangaben:N.C. Hart, A. Hilbert, B. Meurer, M. Schrauder, M. Schmid, J. Siemer, M. Voigt and R.L. Schild

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520 |a Objectives To develop and test a specific formula for estimating weight in the macrosomic fetus. Methods Ultrasound estimations of fetal weight were carried out within 1 week of delivery in 424 singleton fetuses with a birth weight of ≥ 4000 g. Exclusion criteria were multiple pregnancy, intrauterine death and major structural or chromosomal anomalies. Stepwise regression modeling was used to derive a prediction formula with birth weight as the dependent variable and maternal booking weight and fetal biometric measurements as independent parameters. After a new formula for estimated fetal weight (EFW) had been developed in a formula-finding group (n = 284), it was compared with commonly used weight equations (evaluation group, n = 140). Results The new formula (logeEFW = 7.6377445039 + 0.0002951035 × maternal weight + 0.0003949464 × head circumference + 0.0005241529 × abdominal circumference + 0.0048698624 × femur length) proved to be superior to established equations, with the smallest mean error (mean ± SD, −10 ± 202 g), the smallest mean percentage error (mean ± SD, −0.03 ± 4.6%) and the lowest mean absolute percentage error (3.69 (range, 0.05-13.57)%) when studied in the evaluation group. With the new formula, 77.9% of estimates fell within ± 5% of the actual weight at birth, 97.1% within ± 10%, and 100% within ± 15% and ± 20%. Conclusions The new formula allows better weight estimation in the macrosomic fetus. Copyright © 2009 ISUOG. Published by John Wiley & Sons, Ltd. 
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700 1 |a Voigt, M.  |e VerfasserIn  |4 aut 
700 1 |a Schild, R. L.  |e VerfasserIn  |4 aut 
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