TY - JOUR
T1 - New regression formulas for sonographic weight estimation within 10, 7, and 3 days of delivery
AU - Ben-Haroush, Avi
AU - Melamed, Nir
AU - Mashiach, Reuven
AU - Meizner, Israel
AU - Yogev, Yariv
PY - 2008/11/1
Y1 - 2008/11/1
N2 - Objectives. The purpose of this study was to develop new regression formulas based on large numbers of sonographic examinations performed within 10, 7, and 3 days of delivery. Methods. Sonographic fetal biometric measurements and delivery ward data for an unselected population were analyzed. Multivariate linear regression models were fitted to the sonographic data to predict the actual birth weight (BW) within 10, 7, and 3 days. Results. The analyses included 6289, 5449, and 4007 patients who underwent sonographic examinations within 10, 7, and 3 days of delivery, respectively. All models yielded very high correlation coefficients (r = 0.927-0.958; R2 = 0.859-0.918), low mean deviations between the calculated and actual BWs (6.4%-6.6% ± 1 SD of 5.5%-5.9%), and high percentages of the calculated BW within 10% of the actual BW (78.5%-80.4%). Estimated fetal weight analyses made within 3 days of delivery yielded slightly better results than within 7 and 10 days. Conclusions. The new regression formulas yielded overall similar results, with a small advantage for estimates calculated within 3 days of delivery. Further prospective studies are needed to compare the accuracy of these formulas with those used to date.
AB - Objectives. The purpose of this study was to develop new regression formulas based on large numbers of sonographic examinations performed within 10, 7, and 3 days of delivery. Methods. Sonographic fetal biometric measurements and delivery ward data for an unselected population were analyzed. Multivariate linear regression models were fitted to the sonographic data to predict the actual birth weight (BW) within 10, 7, and 3 days. Results. The analyses included 6289, 5449, and 4007 patients who underwent sonographic examinations within 10, 7, and 3 days of delivery, respectively. All models yielded very high correlation coefficients (r = 0.927-0.958; R2 = 0.859-0.918), low mean deviations between the calculated and actual BWs (6.4%-6.6% ± 1 SD of 5.5%-5.9%), and high percentages of the calculated BW within 10% of the actual BW (78.5%-80.4%). Estimated fetal weight analyses made within 3 days of delivery yielded slightly better results than within 7 and 10 days. Conclusions. The new regression formulas yielded overall similar results, with a small advantage for estimates calculated within 3 days of delivery. Further prospective studies are needed to compare the accuracy of these formulas with those used to date.
KW - Fetal weight estimation
KW - Regression formulas
KW - Sonographic measurements
UR - http://www.scopus.com/inward/record.url?scp=55749094326&partnerID=8YFLogxK
U2 - 10.7863/jum.2008.27.11.1553
DO - 10.7863/jum.2008.27.11.1553
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AN - SCOPUS:55749094326
SN - 0278-4297
VL - 27
SP - 1553
EP - 1558
JO - Journal of Ultrasound in Medicine
JF - Journal of Ultrasound in Medicine
IS - 11
ER -