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Erschienen in: Neural Computing and Applications 17/2021

11.01.2021 | Original Article

Evolutionary synthetic oversampling technique and cocktail ensemble model for warfarin dose prediction with imbalanced data

verfasst von: Yanyun Tao, Bin Jiang, Ling Xue, Cheng Xie, Yuzhen Zhang

Erschienen in: Neural Computing and Applications | Ausgabe 17/2021

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Abstract

To improve the accuracy of warfarin daily dose prediction, we develop an evolutionary synthetic oversampling technique (ESMOTE) with a cocktail ensemble model (CEM) called ESMOTE-CEM. Different from conventional oversampling methods, ESMOTE finds the near-optimal oversampling parameters by evolving the parameter representation based on the pre-predicted warfarin dose and then synthesizes new samples to balance the data. The CEM, which improves the performance of random forest (RF) and boosted regression tree (BRT) models using a hybrid mechanism in the regression calculation, estimates the daily dose of warfarin. We test the ESMOTE-CEM on a dataset of 733 samples collected from the First Affiliated Hospital of Soochow University and the International Warfarin Pharmacogenetics Consortium (IWPC). The results show that ESMOTE outperformed the other oversampling methods by at least 6.98% for R2 and 5.03% for the mean squared error (MSE). In terms of the percentage of patients whose predicted warfarin dose is within 20% of the actual stable therapeutic dose (20%-p value), the ESMOTE-CEM achieves a 20%-p value of 50%. Moreover, compared to RF, BRT and AdaBoost models, the CEM is the most suitable base predictive model for ESMOTE.

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Metadaten
Titel
Evolutionary synthetic oversampling technique and cocktail ensemble model for warfarin dose prediction with imbalanced data
verfasst von
Yanyun Tao
Bin Jiang
Ling Xue
Cheng Xie
Yuzhen Zhang
Publikationsdatum
11.01.2021
Verlag
Springer London
Erschienen in
Neural Computing and Applications / Ausgabe 17/2021
Print ISSN: 0941-0643
Elektronische ISSN: 1433-3058
DOI
https://doi.org/10.1007/s00521-020-05568-1

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