Department of Perinatology, Etlik Zubeyde Hanım Women's Health Training and Research Hospital, Ankara, Turkey.
Department of Obstetrics and Gynecology, Etlik Zubeyde Hanım Women's Health Training and Research Hospital, Ankara, Turkey.
J Obstet Gynaecol Res. 2024 Sep;50(9):1522-1530. doi: 10.1111/jog.16025. Epub 2024 Jul 25.
To recalculate the estimated fetal weight (EFW) based on ultrasound measurements in patients complicated with isolated polyhydramnios, using 14 current formulas to observe which formula better predicts the EFW.
This study examined pregnant women who gave birth in the hospital between January 2015 and January 2020. Maximum vertical pocket (MVP) was classified as, mild, moderate, and severe polyhydramnios, and the patients' measurements were reanalyzed using 14 formulas. The estimation of birth weight (EBW) alongside observed birth weight (OBW) facilitated the computation of statistical indices, namely the mean absolute percentage error (MAPE) expressed as [(EBW - OBW)/OBW × 100], the mean percentage error (MPE) denoted as (EBW - OBW)/(OBW × 100), and their corresponding 95% confidence intervals.
A total of 564 polyhydramnios patients were included in the study. When looking at the MAPE, the lowest rate (7.65) was found in the Hadlock 2 formula. Hadlock 1, Hadlock 3, and Shinozuka formulas demonstrated MAPE values most closely aligned with Hadlock 2. Weiner I and Thurnau were the formulas with the highest MAPE values. When the cut-off values for MAPE were taken as 10%, 4/14 of the formulas (Weiner I-II, Vintzleos and Thurnau) gave results above 10%. Among 14 formulas, 3 (21.4%) had positive (sonographic overestimation) (Hadlock 3, Shinozuka, and Vintzleos) and the other 11 (78.6%) had negative MPE (sonographic underestimation).
The Hadlock 2 formula had the lowest MAPE in predicting birth weight in patients with polyhydramnios, closely followed by the Hadlock 1, Hadlock 3, and Shinozuka formulas.
在患有单纯羊水过多的患者中，使用 14 种当前公式基于超声测量值重新计算估计胎儿体重（EFW），观察哪种公式能更好地预测 EFW。
本研究纳入了 2015 年 1 月至 2020 年 1 月期间在我院分娩的孕妇。最大垂直囊（MVP）分为轻度、中度和重度羊水过多，并使用 14 种公式重新分析患者的测量值。通过比较出生体重估计值（EBW）和实际出生体重（OBW），计算出统计指标，包括平均绝对百分比误差（MAPE），表示为[(EBW-OBW)/OBW×100]，平均百分比误差（MPE）表示为(EBW-OBW)/(OBW×100)，以及它们对应的 95%置信区间。
共纳入 564 例羊水过多患者。从 MAPE 来看，Hadlock 2 公式的准确率最高（7.65%）。Hadlock 1、Hadlock 3 和 Shinozuka 公式的 MAPE 值与 Hadlock 2 最为接近。Weiner I 和 Thurnau 公式的 MAPE 值最高。当 MAPE 的截断值为 10%时，14 种公式中有 4 种（Weiner I-II、Vintzleos 和 Thurnau）的结果超过 10%。在 14 种公式中，有 3 种（21.4%）为阳性（超声高估）（Hadlock 3、Shinozuka 和 Vintzleos），其余 11 种（78.6%）为阴性 MPE（超声低估）。
Hadlock 2 公式在预测羊水过多患者的出生体重方面具有最低的 MAPE，其次是 Hadlock 1、Hadlock 3 和 Shinozuka 公式。
