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., ALICI DAVUTOĞLU E., Karahanoglu E., Salihoglu K. N., Kuzu E., ...More

JOURNAL OF OBSTETRICS AND GYNAECOLOGY, vol.37, no.1, pp.53-57, 2017 (SCI-Expanded) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 37 Issue: 1
  • Publication Date: 2017
  • Doi Number: 10.1080/01443615.2016.1209171
  • Journal Name: JOURNAL OF OBSTETRICS AND GYNAECOLOGY
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.53-57
  • Keywords: Foetal weight assessment, foetal weight estimation, birth weight, twin pregnancy, prenatal ultrasonography, BIRTH-WEIGHT, FEMUR LENGTH, ULTRASOUND MEASUREMENTS, SONOGRAPHIC ESTIMATION, HEAD, ACCURACY, CIRCUMFERENCE, EQUATIONS, FETUSES, COHORT
  • Yozgat Bozok University Affiliated: Yes

Abstract

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.