A new mathematical formula to predict the foetal weight in twin pregnancies: A comparison of it with 19 different formulas


Esinler D., Aldemir O. B. , Davutoglu E. , Karahanoglu E., Salihoglu K. N. , Kuzu E., ...Daha Fazla

JOURNAL OF OBSTETRICS AND GYNAECOLOGY, cilt.37, ss.53-57, 2017 (SCI İndekslerine Giren Dergi) identifier identifier identifier

  • Cilt numarası: 37 Konu: 1
  • Basım Tarihi: 2017
  • Doi Numarası: 10.1080/01443615.2016.1209171
  • Dergi Adı: JOURNAL OF OBSTETRICS AND GYNAECOLOGY
  • Sayfa Sayıları: ss.53-57

Özet

One hundred and seventy-two twin-pregnant patients were enrolled. The estimated foetal weight was calculated using 19 different formulas. Ong's formula (0.954 (95%CI=0.938/0.966)), which was designed specifically for twins, produced the highest Cronbach's alpha value followed by Hadlock II (0.952 (95%CI=0.935/0.965)), Hadlock I (0.952 (95%CI=0.935/0.964)), Hadlock III (0.952 (95%CI=0.935/0.964)), Hadlock IV (0.952 (95%CI=0.935/0.964)) and our formula (0.952 (95%CI=0.935/0.964)), which produced the same Cronbach's alpha values for twin A. For twin B, our formula produced the highest Cronbach's alpha value (0.961 (95%CI=0.948/0.972) followed by Hadlock II (0.960 (95%CI=0.946/0.971)), Hadlock I (0.960 (95%CI=0.946/0.970)), Hadlock III (0.960 (95%CI=0.946/0.970)) and Hadlock IV (0.960 (95%CI=0.946/0.970)). In conclusion, our formula (AC, FL) performed well in predicting the foetal weights in twin pregnancies (>24 weeks) in our study. However, it should be tested in other populations. Hadlock II (AC, FL) produced a comparable performance to Hadlock I (BPD, HC, AC, FL), Hadlock III (BPD, AC, FL) and Hadlock IV (HC, AC, FL). Hadlock II may be preferable in twin pregnancies since it is based on AC and FL only.