Two‐dimensional fetal biometry versus three‐dimensional fractional thigh volume for ultrasonographic prediction of birthweight. Issue 1 (20th February 2019)

• Record Type: Journal Article
• Authors: Sharma, K. Aparna; Das, Dipti; Dadhwal, Vatsla; Deka, Dipika; Singhal, Seema; Vanamail, Perumal
• Is Part Of: International journal of gynaecology and obstetrics. Volume 145:Issue 1(2019)
• Page Start: 47
• Page End: 53
• Publication Date: 2019-02-20
• Subjects: Birthweight prediction -- Fractional thigh volume -- Three dimensional ultrasound; Gynecology -- Periodicals; Obstetrics -- Periodicals; Electronic journals; 618
• DOI: 10.1002/ijgo.12770
• Languages: English
• ISSNs: 0020-7292

Abstract

Abstract: Objective: To develop and validate birthweight prediction models using fetal fractional thigh volume (TVol) in an Indian population, comparing them with existing prediction models developed for other ethnicities. Methods: A prospective observational study was conducted among 131 pregnant women (>36 weeks) attending a tertiary hospital in New Delhi, India, for prenatal care between December 1, 2014, and November 1, 2016. Participants were randomly divided into formulating (n=100) and validation (n=31) groups. Multiple regression analysis was performed to generate four models to predict birthweight using various combinations of two‐dimensional (2D) ultrasonographic parameters and a three‐dimensional (3D) ultrasonographic parameter (TVol). The best fit model was compared with previously published 2D and 3D models. Results: The best fit model comprised biparietal diameter, head circumference, abdominal circumference, and TVol. This model had the lowest mean percentage error (0.624 ± 8.075) and the highest coefficient of determination ( R 2 =0.660). It correctly predicted 70.2% and 91.6% of birthweights within 5% and 10% of actual weight, respectively. Compared with previous models, attributability for the 2D and 3D models was 0.65 and 0.55, respectively. Accuracy was −0.05 ± 1.007 and −2.54 ± 1.11, respectively. Conclusion: Models that included TVol provided good prediction of birthweight in the target population. Abstract : Three‐dimensional ultrasonographic measurement of fractional thigh volume provided an advantage over two‐dimensional ultrasonographic parameters of fetal biometry for predicting birthweight among Indian women.