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Birthweight charts customised for maternal height optimises the classification of small and large-for-gestational age
Bert Zeegers1, Pien Offerhaus1, Liset Hoftiezer2
1Research Centre for Midwifery Science, Zuyd University, Maastricht, The Netherlands.
Aim:
To construct birthweight charts customised for maternal height and evaluate the effect of customization on SGA and LGA classification.
Methods:
Data were extracted (n = 21 350) from the MiCaS project in the Netherlands (2012-2020). We constructed the MiCaS-birthweight chart customised for maternal height using Hadlock's method. We defined seven 5-centimetre height categories from 153 to 157 cm until 183-187 cm and calculated SGA and LGA prevalences for each category, using MiCaS and current Dutch birthweight charts.
Results:
The MiCaS-chart showed substantially higher birthweight values between identical percentiles with increasing maternal height. In the Dutch birthweight chart, not customised for maternal height, the prevalence of SGA (
Conclusion:
Compared to the current Dutch birthweight chart, the MiCaS-birthweight chart customised for maternal height shows a more even distribution of SGA and LGA prevalences across maternal heights.
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