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KMID : 0311120220630070692
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Yonsei Medical Journal
2022 Volume.63 No. 7 p.692 ~ p.700
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Machine Learning Model for Classifying the Results of Fetal Cardiotocography Conducted in High-Risk Pregnancies
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Park Tae-Jun
Chang Hye-Jin
Choi Byung-Jin
Jung Jung-Ah
Kang Seong-Woo
Yoon Seok-Young
Kim Mi-Ran
Yoon Duk-Yong
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Abstract
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Purpose: Fetal well-being is usually assessed via fetal heart rate (FHR) monitoring during the antepartum period. However, theinterpretation of FHR is a complex and subjective process with low reliability. This study developed a machine learning modelthat can classify fetal cardiotocography results as normal or abnormal.
Materials and Methods: In total, 17492 fetal cardiotocography results were obtained from Ajou University Hospital and 100 fetalcardiotocography results from Czech Technical University and University Hospital in Brno. Board-certified physicians then re viewed the fetal cardiotocography results and labeled 1456 of them as gold-standard; these results were used to train and validatethe model. The remaining results were used to validate the clinical effectiveness of the model with the actual outcome.
Results: In a test dataset, our model achieved an area under the receiver operating characteristic curve (AUROC) of 0.89 and areaunder the precision-recall curve (AUPRC) of 0.73 in an internal validation dataset. An average AUROC of 0.73 and average AUPRCof 0.40 were achieved in the external validation dataset. Fetus abnormality score, as calculated from the continuous fetal cardioto cography results, was significantly associated with actual clinical outcomes [intrauterine growth restriction: odds ratio, 3.626(p=0.031); Apgar score 1 min: odds ratio, 9.523 (p<0.001), Apgar score 5 min: odds ratio, 11.49 (p=0.001), and fetal distress: odds ra tio, 23.09 (p<0.001)].
Conclusion: The machine learning model developed in this study showed precision in classifying FHR signals. This suggests thatthe model can be applied to medical devices as a screening tool for monitoring fetal status.
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KEYWORD
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Cardiotocography, high-risk-pregnancy, machine learning
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