Prediction of birth weight using fetal thigh and upper-arm volumes by three-dimensional ultrasonography in a Brazilian population

Prediction of birth weight using fetal thigh and upper-arm volumes by three-dimensional ultrasonography in a Brazilian population

Author Machado Nardozza, Luciano Marcondes Autor UNIFESP Google Scholar
Vieira, Márcio Fragoso Autor UNIFESP Google Scholar
Araujo Junior, Edward Autor UNIFESP Google Scholar
Rolo, Liliam Cristine Autor UNIFESP Google Scholar
Moron, Antonio Fernandes Autor UNIFESP Google Scholar
Institution Universidade Federal de São Paulo (UNIFESP)
Abstract Methods. A cross-sectional study involving 81 live singletons was performed. VolArm and VolTh were obtained using 3DUS multiplanar mode with 5 mm slices. Linear and polynomial regressions were calculated to determine the best formula to predict BW using VolArm and VolTh. Analysis of variance was used to compare errors in BW using these formulae and using Shepard's and Hadlock's formulae. the interclass correlation coefficient (ICC) was used to assess intra and interobserver variability of measurements.Results. the best formula to predict BW based on VolArm was a simple linear equation (BW = 803.91 + 39.89VolArm), and for VolTh it was a second degree polynomial equation (BW = 32.37VolTh - 0.06VolTh<SU2</SU). A third formula using both parameters was also constructed (BW = 792.87 + 22.81VolArm + 7.54VolTh). the error (E), percent error (PE), absolute error (AE) and absolute percent error (APE) for the BW prediction using VolArm were 0 g, 163.4 g, 0.5% and 5.4%, respectively. the same results for E, PE, AE and APE using VolTh were 0.99 g, 155.5 g, 0.3% and 5.2% and for the combined formula using both VolArm and VolTh the E, PE, AE and APE were 0 g, 138.4 g, -0.4% and 4.6%, respectively. VolArm and VolTh were highly reproducible with intraobserver ICC of 0.98 and 0.99 and interobserver ICC of 0.96 and 0.97, respectively.Conclusions. BW estimated through formulae that use the fetal arm and thigh volumes assessed through 3DUS are not superior to two-dimensional formulae.
Keywords Birth weight
fetal thigh volume
fetal upper-arm volume
three-dimensional ultrasonography
Language English
Date 2010-05-01
Published in Journal of Maternal-fetal & Neonatal Medicine. London: Informa Healthcare, v. 23, n. 5, p. 393-398, 2010.
ISSN 1476-7058 (Sherpa/Romeo, impact factor)
Publisher Informa Healthcare
Extent 393-398
Origin http://dx.doi.org/10.3109/14767050903184215
Access rights Closed access
Type Article
Web of Science ID WOS:000276462500007
URI http://repositorio.unifesp.br/handle/11600/32541

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