Sonographic prediction of fetal macrosomia: The relationship between estimated fetal weight and mode of delivery

Methods This is a retrospective cohort study carried out at the Orenburg Municipal Perinatal Center and Maternity Hospital No 2 from 2006 to 2012. In this study 3760 pregnancy outcomes were analyzed. The estimated fetal sonographic weight by Hadlock’s formula was obtained within the last week prior to delivery. The study population was divided into 4 groups (true positive, true negative, false positive, false negative) according to the estimated fetal weight (EFW) and birth weight (BW). Receiver-operating characteristics (ROC) curves were generated to compare the prediction of macrosomia when using different observation methods. Sensitivity, specificity, positive predictive value (PPV), negative predictive value (NPV) and accuracy were calculated. The mean value of the two groups was compared using two sample t test and χ2 test for comparison of proportions.