A prospective pilot study in assessing the accuracy of ultrasound estimated fetal weight prior to delivery

Sekar, Renuka, Khatun, Mohsina, Barrett, Helen L. and Duncombe, Gregory (2016) A prospective pilot study in assessing the accuracy of ultrasound estimated fetal weight prior to delivery. Australian and New Zealand Journal of Obstetrics and Gynaecology, 56 1: 49-53. doi:10.1111/ajo.12391


Author Sekar, Renuka
Khatun, Mohsina
Barrett, Helen L.
Duncombe, Gregory
Title A prospective pilot study in assessing the accuracy of ultrasound estimated fetal weight prior to delivery
Journal name Australian and New Zealand Journal of Obstetrics and Gynaecology   Check publisher's open access policy
ISSN 1479-828X
0004-8666
Publication date 2016-02-01
Year available 2015
Sub-type Article (original research)
DOI 10.1111/ajo.12391
Open Access Status Not yet assessed
Volume 56
Issue 1
Start page 49
End page 53
Total pages 5
Place of publication Richmond, Australia
Publisher Wiley-Blackwell Publishing Asia
Language eng
Abstract BackgroundPerinatal mortality and morbidity related to growth restriction and macrosomia are predicted by birthweight. Estimated fetal weight is a surrogate measure for neonatal weight, and accurate measurement of this is central to providing counselling and managing preterm birth.
Formatted abstract
Background
Perinatal mortality and morbidity related to growth restriction and macrosomia are predicted by birthweight. Estimated fetal weight is a surrogate measure for neonatal weight, and accurate measurement of this is central to providing counselling and managing preterm birth.

Aims
To assess the accuracy of estimated fetal weight (EFW) measured by two sonographers within 1 week of delivery using Hadlock formula.

Materials and Methods
Two sonographers independently scanned 150 women with singleton pregnancies, who were booked for elective delivery. The sonographers measured four biometric measurements in estimating fetal weight. The accuracy of EFW compared to the birthweight was examined. We also assessed the sensitivity and specificity for diagnosis of small-for-gestational age (SGA) and large–for-gestational age (LGA) according to the EFW.

Results
Estimated fetal weight was similar to actual birthweight, with a mean percentage difference (SD) of 1.4(7.0) (P = 0.44). The reliability coefficient of EFW compared to actual birthweight was 0.97 (95% CI (0.96, 0.98)). There was no significant difference between the sonographers for EFWs and among the sonographers from the ultrasound scan to delivery interval. The sensitivity and specificity for detection of SGA and LGA were 93.3% and 99.3%, 60% and 95.6%, respectively.

Conclusions

There is high reproducibility with minimum discrepancy from actual birthweight among sonographers 1 week prior to delivery using Hadlock formula with better prediction of SGA neonates.
Keyword Accuracy prior to delivery
Estimated fetal weight
Interobserver reliability
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status Non-UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: UQ Centre for Clinical Research Publications
HERDC Pre-Audit
Admin Only - School of Medicine
School of Medicine Publications
 
Versions
Version Filter Type
Citation counts: TR Web of Science Citation Count  Cited 2 times in Thomson Reuters Web of Science Article | Citations
Scopus Citation Count Cited 1 times in Scopus Article | Citations
Google Scholar Search Google Scholar
Created: Sat, 04 Jun 2016, 05:46:58 EST by System User on behalf of Learning and Research Services (UQ Library)