Konwar Ranjumoni, Basumatary Bharati, Dutta Malamoni, Mahanta Putul
Radiology, Fakhruddin Ali Ahmed Medical College and Hospital, Barpeta 781301, Assam, India.
Anatomy, Assam Medical College and Hospital, Dibrugarh 786002, Assam, India.
Int J Biomater. 2021 Dec 20;2021:9090338. doi: 10.1155/2021/9090338. eCollection 2021.
The cross-sectional study included 100 pregnant women aged 20-45 years from the Kamrup district admitted to Guwahati Medical College and Hospital, Guwahati, Assam. The data were analyzed using Microsoft Excel and SPSS version 16. The EFW at term was calculated using Shepard's formula and Hadlock's formula. Differences in means are compared using the one-way ANOVA or Kruskal-Wallis test and paired -test. The accuracy of the two procedures was evaluated using mean absolute error (MAE) and mean absolute percentage error (MAPE). A value<0.05 was considered significant.
The present study included 100 pregnant women aged 21-38 years with term or postterm pregnancies subjected to ultrasonographic evaluation within 72 hours of delivery. The mean (±s.d.) EFW by Shepard's formula was 2716.05 (±332.38) g and Hadlock's formula was 2740.44 (±353.23) g, respectively. For Hadlock's formula, MAE ± s.d. was found to be higher (overall 84.59 ± 76.54) specifically in the weight category less than 2500 (106.42 ± 88.11) as compared to Shepard's (overall MAE ± s.d = 79.86 ± 64.78, and among ABW < 2500 g, MAE ± s.d = 65.04 ± 61.02). The overall MAPE of Hadlock's formula was 3.14% and that for Shepard's formula was 2.91%, and the difference was not statistically significant. Both Shepard's formula and Hadlock's formula had a sensitivity of 92.85% in detecting IUGR, but Hadlock's method had higher specificity (66%), higher PPV (86.67%), and higher NPV (80%).
The ultrasonographic evaluation of fetal weight helps predict fetal birth weight precisely and can influence obstetric management decisions concerning timing and route of delivery, thus reducing perinatal morbidity and mortality.
这项横断面研究纳入了100名年龄在20至45岁之间、来自卡姆鲁普地区、入住阿萨姆邦古瓦哈蒂医学院和医院的孕妇。数据使用Microsoft Excel和SPSS 16版本进行分析。足月胎儿估计体重（EFW）采用谢泼德公式和哈德洛克公式计算。均值差异采用单因素方差分析或克鲁斯卡尔 - 沃利斯检验以及配对检验进行比较。使用平均绝对误差（MAE）和平均绝对百分比误差（MAPE）评估这两种方法的准确性。P值<0.05被认为具有统计学意义。
本研究纳入了100名年龄在21至38岁之间、足月或过期妊娠的孕妇，她们在分娩后72小时内接受了超声评估。根据谢泼德公式计算的平均（±标准差）EFW为2716.05（±332.38）克，根据哈德洛克公式计算的为2740.44（±353.23）克。对于哈德洛克公式，发现MAE±标准差更高（总体为84.59±76.54），特别是在体重低于2500克的类别中（106.42±88.11），相比之下谢泼德公式（总体MAE±标准差 = 79.86±64.78，在出生体重<2500克中，MAE±标准差 = 65.04±61.02）。哈德洛克公式的总体MAPE为3.14%，谢泼德公式的为2.91%，差异无统计学意义。谢泼德公式和哈德洛克公式在检测胎儿生长受限（IUGR）方面的敏感性均为92.85%，但哈德洛克方法具有更高的特异性（66%）、更高的阳性预测值（PPV，86.67%）和更高的阴性预测值（NPV，80%）。
胎儿体重的超声评估有助于精确预测胎儿出生体重，并可影响有关分娩时间和途径的产科管理决策，从而降低围产期发病率和死亡率。
