Esinler Deniz, Bircan Oya, Esin Sertac, Sahin Elif Gulsah, Kandemir Omer, Yalvac Serdar
Department of Obstetrics and Gynecology, Division of Maternal and Fetal Medicine, Etlik Zubeyde Hanim Maternity Hospital, Ankara, Turkey.
Gynecol Obstet Invest. 2015;80(2):78-84. doi: 10.1159/000365814. Epub 2015 Jul 10.
To compare the accuracy of 18 formulas in predicting fetal weight and also to make a comparison of these formulas in low-birth-weight fetuses (<2,500 g) and in fetuses weighing >4,000 g.
Four-hundred-and-ninety-five pregnant patients were enrolled. The estimated fetal weight was calculated using 18 different formulas. The mean percentage error, the mean absolute percentage error and reliability analysis were used to compare the performance of the formulas.
The Cronbach's alpha was the highest in the formulas Hadlock I (0.977 (95% CI = 0.972-0.980)), Hadlock III (0.977 (95% CI = 0.972-0.980)) and Ott (0.975 (95% CI = 0.970-0.979)) in all fetuses. It was the highest in formulas Ott (0.383 (95% CI = 0.091-0.581)), Hadlock IV (0.371 (95% CI = 0.074-0.572)) and Combs (0.369 (95% CI = 0.071-0.571)) in fetuses >4,000 g. It was the highest in formulas Coombs (0.957 (95% CI = 0.940-0.569)), Ott (0.956 (95% CI = 0.939-0.968)) and Hadlock IV (95% CI = 0.956 (0.938-0.968)) in fetuses <2,500 g.
We noted that formulas Hadlock I, Hadlock III and Ott may be used to predict the estimated fetal weight accurately in all fetuses in our study. Formulas Ott, Hadlock IV and Coombs may be preferred to predict EFW in fetuses <2,500 g and >4,000 g. Better formulas should be developed to predict the fetal weight in fetuses >4,000 g.
比较18种公式预测胎儿体重的准确性，并比较这些公式在低出生体重胎儿（<2500克）和体重>4000克胎儿中的表现。
招募了495名孕妇。使用18种不同公式计算估计胎儿体重。采用平均百分比误差、平均绝对百分比误差和可靠性分析来比较这些公式的性能。
在所有胎儿中，Hadlock I公式（0.977（95%CI = 0.972 - 0.980））、Hadlock III公式（0.977（95%CI = 0.972 - 0.980））和Ott公式（0.975（95%CI = 0.970 - 0.979））的Cronbach's alpha最高。在体重>4000克的胎儿中，Ott公式（0.383（95%CI = 0.091 - 0.581））、Hadlock IV公式（0.371（95%CI = 0.074 - 0.572））和Combs公式（0.369（95%CI = 0.071 - 0.571））的Cronbach's alpha最高。在体重<2500克的胎儿中，Coombs公式（0.957（95%CI = 0.940 - 0.569））、Ott公式（0.956（95%CI = 0.939 - 0.968））和Hadlock IV公式（95%CI = 0.956（0.938 - 0.968））的Cronbach's alpha最高。
我们注意到，在本研究中，Hadlock I、Hadlock III和Ott公式可用于准确预测所有胎儿的估计胎儿体重。对于体重<2500克和>4000克的胎儿，Ott、Hadlock IV和Combs公式可能更适合预测估计胎儿体重。应开发更好的公式来预测体重>4000克胎儿的体重。
