Publication: Intrapartum prediction of birth weight with a simplified algorithmic approach derived from maternal characteristics
Issued Date
2019-08-01
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ISSN
16193997
03005577
03005577
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2-s2.0-85068728348
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Mahidol University
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SCOPUS
Bibliographic Citation
Journal of Perinatal Medicine. Vol.47, No.6 (2019), 643-650
Suggested Citation
Piengbulan Yapan, Chirameth Promchirachote, Chutima Yaiyiam, Suraiya Rahman, Julaporn Pooliam, Tuangsit Wataganara Intrapartum prediction of birth weight with a simplified algorithmic approach derived from maternal characteristics. Journal of Perinatal Medicine. Vol.47, No.6 (2019), 643-650. doi:10.1515/jpm-2018-0347 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/51490
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Title
Intrapartum prediction of birth weight with a simplified algorithmic approach derived from maternal characteristics
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Abstract
© 2019 2019 Walter de Gruyter GmbH, Berlin/Boston. To derive and validate a population-specific multivariate approach for birth weight (BW) prediction based on quantitative intrapartum assessment of maternal characteristics by means of an algorithmic method in low-risk women. The derivation part (n = 200) prospectively explored 10 variables to create the best-fit algorithms (70% correct estimates within ±10% of actual BW) for prediction of BW at term; vertex presentation with engagement. The algorithm was then cross validated with samples of unrelated cases (n = 280) to compare the accuracy with the routine abdominal palpation method. The best-fit algorithms were parity-specific. The derived simplified algorithms were (1) BW (g) = 100 [(0.42 × symphysis-fundal height (SFH; cm)) + gestational age at delivery (GA; weeks)-25] in nulliparous, and (2) BW (g) = 100 [(0.42 × SFH (cm)) + GA-23] in multiparous. Cross validation showed an overall 69.3% accuracy within ±10% of actual BW, which exceeded routine abdominal palpation (60.4%) (P = 0.019). The algorithmic BW prediction was significantly more accurate than routine abdominal palpation in women with the following characteristics: BW 2500-4000 g, multiparous, pre-pregnancy weight <50 kg, current weight <60 kg, height <155 cm, body mass index (BMI) <18.5 kg/m2, cervical dilatation 3-5 cm, station <0, intact membranes, SFH 30-39 cm, maternal abdominal circumference (mAC) <90 cm, mid-upper arm circumference (MUAC) <25 cm and female gender of the neonates (P < 0.05). An overall accuracy of term BW prediction by our simplified algorithms exceeded that of routine abdominal palpation.