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Photoplethysmography signal-based automated diagnosis of type-2 diabetes using tunable-Q wavelet transform and least-square support vector machine classifier

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Abstract

Type-2 diabetes mellitus (T2DM) is a chronic metabolic disorder affecting numerous people throughout the world. If untreated in the initial stages, diabetes-related complications such as retinopathy, neuropathy, and cardiac issues may arise in the body. This research introduces the efficient automatic T2DM identification method using photoplethysmography (PPG) signals. The tunable-Q wavelet transform (TQWT) is used to analyze the PPG signals which permit the PPG signal to be converted into predictable wavelets. Entropy features are then extracted by these wavelets for events of healthy controls and T2DM followed by statistical significance analysis and classification using least-square support vector machine (LS-SVM) classifier to identify the T2DM events. In addition, the majority voting-based feature selection method is applied for feature reduction and the most relevant feature selection. With top-ranked 20 relevant features, the LS-SVM classifier with radial basis function (RBF) kernel attained a maximum 98.51% classification accuracy, 98.64% sensitivity, 98.38% specificity, 98.61% area under the curve, 98.31% precision, and, 98.47% F-score. The results indicate that the suggested approach for T2DM identification has better classification performance than existing approaches.

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Data availability and materials

The data used to support the findings of this study are taken from Nirala et al. [8] (https://doi.org/10.1016/j.bbe.2018.09.007). This dataset is not publicly available. The dataset generated during the current study are available from the corresponding author on reasonable request after publication of this article.

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Acknowledgements

The authors would like to thank the National Institute of Technology Raipur, India for providing infrastructure and facilities to carry out this research work.

Funding

This research work has no funding support. It’s part of my PhD.

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Contributions

All authors contributed to the study's conception and design. Material preparation, data collection, and analysis were performed by Bhanupriya Mishra. Data collection was done by Neelam Shobha Nirala, and Figs. 1, 2, 3 and 4 were prepared by Bikesh Kumar Singh. The first draft of the manuscript was written by Bhanupriya Mishra, and all authors commented on previous versions of the manuscript and approved the final manuscript.

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Correspondence to Bhanupriya Mishra.

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The authors declare no competing interests.

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The authors state that they have no conflict of interest.

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Informed consent was obtained from all individual participants included in the study.

Ethical approval and informed consent

In this work, the dataset was used from the Institute whose ethical approval had already taken and mentioned in Nirala et. al. [8]. This work approved by Institutional Ethical Committee National Institute of Technology Raipur (Letter No- NITRR/IEC/3/2015).

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Mishra, B., Nirala, N. & Singh, B.K. Photoplethysmography signal-based automated diagnosis of type-2 diabetes using tunable-Q wavelet transform and least-square support vector machine classifier. SIViP 17, 2745–2754 (2023). https://doi.org/10.1007/s11760-023-02491-5

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