Department of Obstetrics and Gynecology, Erlangen University Hospital, Erlangen, Germany.
Department of Medical Biometry, Informatics, and Epidemiology, Bonn University Hospital, Bonn, Germany.
J Ultrasound Med. 2020 Feb;39(2):341-350. doi: 10.1002/jum.15112. Epub 2019 Aug 22.
To evaluate different formulas for estimating fetal weight in diabetic pregnancies.
This retrospective study evaluated the precision of ultrasound fetal weight estimation in 756 pregnancies complicated by gestational diabetes between 2002 and 2016. The estimated fetal weights (EFWs) were obtained within 7 days of delivery from 10 weight estimation formulas and were compared with pair-wise matched controls from 15,701 patients. The precision of the evaluated formulas for EFW was analyzed by median absolute percentage errors (MAPEs), mean percentage errors (MPEs), and proportions of estimates within 10% of actual birth weight.
Among the tested formulas, the lowest MAPE was detected with formula I of Hadlock et al (Am J Obstet Gynecol 1985; 151:333-337), and the formula of Schild et al (Ultrasound Obstet Gynecol 2004; 23:30-35) had the highest proportion of estimates within the 10% range. The EFW in diabetic patients showed a slight trend toward overestimation in comparison with the matched controls (MPE estimates showed a trend toward more positive values). In most of the EFW formulas that were evaluated, no significant differences were detected in MAPEs and estimates within the 10% range. The MPE estimates with most formulas in both groups were close to zero. Overall, the differences between most of the evaluated formulas were small.
Little evidence was found for differences in the accuracy of the EFW in diabetic pregnancies and controls. The Hadlock I formula showed the lowest MAPE, and the Schild formula had the highest proportion of estimates within the 10% range.
评估用于糖尿病妊娠胎儿体重估计的不同公式。
本回顾性研究评估了 2002 年至 2016 年间 756 例妊娠合并糖尿病患者的超声胎儿体重估计的精确性。在分娩后 7 天内，通过 10 种体重估计公式获得了估计胎儿体重（EFW），并与 15701 例患者的 15701 例配对对照组进行了比较。通过中位数绝对百分比误差（MAPE）、平均百分比误差（MPE）和估计值在实际出生体重 10%范围内的比例分析评估公式的 EFW 精度。
在所测试的公式中，Hadlock 等人的公式 I（Am J Obstet Gynecol 1985; 151:333-337）的 MAPE 最低，而 Schild 等人的公式（Ultrasound Obstet Gynecol 2004; 23:30-35）的估计值在 10%范围内的比例最高。与匹配的对照组相比，糖尿病患者的 EFW 略有高估趋势（MPE 估计值呈更正值趋势）。在评估的大多数 EFW 公式中，MAPE 和在 10%范围内的估计值没有显著差异。在两组中，大多数公式的 MPE 估计值接近零。总体而言，评估的大多数公式之间的差异很小。
几乎没有证据表明糖尿病妊娠和对照组 EFW 的准确性存在差异。Hadlock I 公式显示最低的 MAPE，而 Schild 公式具有最高的 10%范围内的估计比例。
