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Zurich Open Repository and Archive 

Permanent URL to this publication: http://dx.doi.org/10.5167/uzh-6125

Burkhardt, T; Schäffer, L; Zimmermann, R; Kurmanavicius, J (2008). Newborn weight charts underestimate the incidence of low birthweight in preterm infants. American Journal of Obstetrics and Gynecology, 199(2):139.e1-139.e6.

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Abstract

OBJECTIVE: The objective of the study was to compare sonographic fetal weight estimates with newborn weight charts and analyze the predictive accuracy of the ponderal index (PI) in preterm infants. STUDY DESIGN: We generated sonographic reference curves for fetal weight and PI estimates from a database of fetal biometric records from 12,589 term deliveries. We then plotted sonographic and newborn weight and PI of 2406 preterm newborns on these curves and compared them with published newborn weight charts. RESULTS: The third centiles of sonographic and newborn weights diverged markedly between 25 and 36 weeks of gestation and by more than 400 g at 32-33 weeks. In contrast, sonographic and newborn PI values were similar despite uncertainties as to fetal length. CONCLUSION: We suggest using sonographic reference fetal weights to screen preterm newborns for low birthweight. Uncertainties in fetal length threaten the reliability of the PI.

Item Type:Journal Article, refereed, original work
Communities & Collections:04 Faculty of Medicine > University Hospital Zurich > Clinic for Obstetrics
DDC:610 Medicine & health
Uncontrolled Keywords:estimated fetal weight, low birthweight, ponderal index, preterm delivery, ultrasound
Language:English
Date:August 2008
Deposited On:16 Dec 2008 12:24
Last Modified:27 Nov 2013 16:58
Publisher:Elsevier
ISSN:0002-9378
Publisher DOI:10.1016/j.ajog.2008.01.011
PubMed ID:18395687
Citations:Web of Science®. Times Cited: 1
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Scopus®. Citation Count: 7

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