Kurmanavicius Juozas, Burkhardt Tilo, Wisser Josef, Huch Renate
Perinatal Research Unit, Department of Obstetrics, Zurich University Hospital, Zurich, Switzerland.
J Perinat Med. 2004;32(2):155-61. doi: 10.1515/JPM.2004.028.
To determine the accuracy of birth weight in different birth weight (BW) groups using widely accepted formulas for fetal weight estimation (EFW). The secondary purpose was to estimate the role of examiners on the accuracy of EFW.
The cross-sectional data were obtained from 5612 pregnant women. Fetal weight was estimated for each fetus using the formulas of Campbell and Wilkin, Shepard, 2 formulas of Hadlock and Merz. Inclusion criteria were: singleton pregnancy, complete ultrasound parameters, EFW obtained within the last week prior to delivery, the live born infant without congenital malformations or hydrops.
The highest intraclass correlation coefficient and the most stable results in all BW groups were generated with both Hadlock formulas. Both Hadlock and Campbell formulas had the lowest percent errors (PE) in BW groups between <1500 g and 3500 g. Shepard and Merz formulas had lower PEs in BW groups between 3501 g and >4000 g. However in BW groups under 3500 g they were imprecise. The PE of EFW varied from -4.0 +/- 8.5% to 1.3 +/- 8.5% between examiners.
Both Hadlock formulas showed the most stable results in all of the weight groups. There is also a need for routine evaluation of the accuracy of EFW for every examiner, to make suggestions, what fetal measurements must be improved to improve EFW.
使用广泛接受的胎儿体重估计（EFW）公式，确定不同出生体重（BW）组中出生体重的准确性。次要目的是评估检查者对EFW准确性的影响。
获取5612名孕妇的横断面数据。使用坎贝尔和威尔金公式、谢泼德公式、哈德洛克的2个公式以及默茨公式对每个胎儿的体重进行估计。纳入标准为：单胎妊娠、完整的超声参数、分娩前最后一周内获得的EFW、无先天性畸形或水肿的活产婴儿。
哈德洛克的两个公式在所有BW组中产生了最高的组内相关系数和最稳定的结果。在BW<1500 g至3500 g的组中，哈德洛克公式和坎贝尔公式的百分比误差（PE）最低。在BW为3501 g至>4000 g的组中，谢泼德公式和默茨公式的PE较低。然而，在BW<3500 g的组中，它们的准确性欠佳。检查者之间EFW的PE在-4.0±8.5%至1.3±8.5%之间变化。
哈德洛克的两个公式在所有体重组中均显示出最稳定的结果。还需要对每位检查者的EFW准确性进行常规评估，以便提出建议，必须改进哪些胎儿测量方法以提高EFW。
