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. 2018 Oct;125(11):1397-1404.
doi: 10.1111/1471-0528.15179. Epub 2018 Apr 15.

Estimating gestational age at birth from fundal height and additional anthropometrics: a prospective cohort study

S J Pugh  1 , A M Ortega-Villa  2 , W Grobman  3 , R B Newman  4 , J Owen  5 , D A Wing  6   7 , P S Albert  2 , K L Grantz  1
Affiliations

Estimating gestational age at birth from fundal height and additional anthropometrics: a prospective cohort study

S J Pugh et al. BJOG. 2018 Oct.

Abstract

Objective: Accurate assessment of gestational age (GA) is critical to paediatric care, but is limited in developing countries without access to ultrasound. Our objectives were to assess the accuracy of prediction of GA at birth and preterm birth classification using routinely collected anthropometry measures.

Design: Prospective cohort study.

Setting: United States.

Population or sample: A total of 2334 non-obese and 468 obese pregnant women.

Methods: Enrolment GA was determined based on last menstrual period, confirmed by first-trimester ultrasound. Maternal anthropometry and fundal height (FH) were measured by a standardised protocol at study visits; FH alone was additionally abstracted from medical charts. Neonatal anthropometry measurements were obtained at birth. To estimate GA at delivery, we developed three predictor models using longitudinal FH alone and with maternal and neonatal anthropometry. For all predictors, we repeatedly sampled observations to construct training (60%) and test (40%) sets. Linear mixed models incorporated longitudinal maternal anthropometry and a shared parameter model incorporated neonatal anthropometry. We assessed models' accuracy under varied scenarios.

Main outcome measures: Estimated GA at delivery.

Results: Prediction error for various combinations of anthropometric measures ranged between 13.9 and 14.9 days. Longitudinal FH alone predicted GA within 14.9 days with relatively stable prediction errors across individual race/ethnicities [whites (13.9 days), blacks (15.1 days), Hispanics (15.5 days) and Asians (13.1 days)], and correctly identified 75% of preterm births. The model was robust to additional scenarios.

Conclusions: In low-risk, non-obese women, longitudinal FH measures alone can provide a reasonably accurate assessment of GA when ultrasound measures are not available.

Tweetable abstract: Longitudinal fundal height alone predicts gestational age at birth when ultrasound measures are unavailable.

Keywords: Anthropometry; fundal height; gestational age; prediction.

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References

    1. Method for Estimating Due Date. Committee Opinion No. 611. American College of Obstetricians and Gynecologists. Obstet Gynecol. 2014;(124):863–6. - PubMed
    1. Stark AR American Academy of Pediatrics Committee on F, Newborn. Levels of neonatal care. Pediatrics. 2004;114(5):1341–7. - PubMed
    1. Blencowe H, Cousens S, Oestergaard MZ, Chou D, Moller AB, Narwal R, et al. National, regional, and worldwide estimates of preterm birth rates in the year 2010 with time trends since 1990 for selected countries: a systematic analysis and implications. Lancet. 2012;379(9832):2162–72. - PubMed
    1. Shah S, Bellows BA, Adedipe AA, Totten JE, Backlund BH, Sajed D. Perceived barriers in the use of ultrasound in developing countries. Crit Ultrasound J. 2015;7(1):28. - PMC - PubMed
    1. Ballard JL, Khoury JC, Wedig K, Wang L, Eilers-Walsman BL, Lipp R. New Ballard Score, expanded to include extremely premature infants. J Pediatr. 1991;119(3):417–23. - PubMed

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