ObjectiveTo 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.MethodsThis 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.ResultsA 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).ConclusionThe 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.

中文翻译：

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超声预测孤立性羊水过多的胎儿体重：14个公式的比较


目的对合并单纯性羊水过多的患者，根据超声测量结果重新计算估计胎儿体重（EFW），并采用14个现行公式，观察哪种公式能更好地预测EFW。方法本研究以2015年1月至2020年1月期间在医院分娩的孕妇为研究对象。最大垂直袋（MVP）分为轻度、中度和重度羊水过多，并使用 14 个公式重新分析患者的测量结果。出生体重（EBW）的估计和观察出生体重（OBW）有助于统计指标的计算，即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），及其相应的95%置信区间。结果共有564名羊水过多患者纳入研究。在查看 MAPE 时，发现 Hadlock 2 公式中的比率最低 (7.65)。 Hadlock 1、Hadlock 3 和 Shinozuka 公式显示 MAPE 值与 Hadlock 2 最接近。Weiner I 和 Thurnau 是具有最高 MAPE 值的公式。当 MAPE 的截止值为 10% 时，4/14 的公式（Weiner I–II、Vintzleos 和 Thurnau）给出的结果高于 10%。在 14 个公式中，3 个 (21.4%) 具有阳性（超声高估）（Hadlock 3、Shinozuka 和 Vintzleos），另外 11 个（78.6%）具有负 MPE（超声低估）。结论 Hadlock 2 公式在预测方面具有最低的 MAPE羊水过多患者的出生体重，紧随其后的是 Hadlock 1、Hadlock 3 和 Shinozuka 配方。