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Combined brain topological metrics with machine learning to distinguish essential tremor and tremor-dominant Parkinson’s disease

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Abstract

Background

Essential tremor (ET) and Parkinson’s disease (PD) are the two most prevalent movement disorders, sharing several overlapping tremor clinical features. Although growing evidence pointed out that changes in similar brain network nodes are associated with these two diseases, the brain network topological properties are still not very clear.

Objective

The combination of graph theory analysis with machine learning (ML) algorithms provides a promising way to reveal the topological pathogenesis in ET and tremor-dominant PD (tPD).

Methods

Topological metrics were extracted from Resting-state functional images of 86 ET patients, 86 tPD patients, and 86 age- and sex-matched healthy controls (HCs). Three steps were conducted to feature dimensionality reduction and four frequently used classifiers were adopted to discriminate ET, tPD, and HCs.

Results

A support vector machine classifier achieved the best classification performance of four classifiers for discriminating ET, tPD, and HCs with 89.0% mean accuracy (mACC) and was used for binary classification. Particularly, the binary classification performances among ET vs. tPD, ET vs. HCs, and tPD vs. HCs were with 94.2% mACC, 86.0% mACC, and 86.3% mACC, respectively. The most power discriminative features were mainly located in the default, frontal-parietal, cingulo-opercular, sensorimotor, and cerebellum networks. Correlation analysis results showed that 2 topological features negatively and 1 positively correlated with clinical characteristics.

Conclusions

These results demonstrated that combining topological metrics with ML algorithms could not only achieve high classification accuracy for discrimination ET, tPD, and HCs but also help to reveal the potential brain topological network pathogenesis in ET and tPD.

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Data availability

The data supporting the findings of this study are available on request from the corresponding author. The data are not publicly available due to privacy or ethical restrictions.

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Acknowledgements

The authors thank all participants for their participation.

Funding

This research was supported by the National Natural Science Foundation of China (NSFC: 81671663) and the Natural Science Foundation of Chongqing (NSFCQ: cstc2014jcyjA10047).

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Authors and Affiliations

Authors

Contributions

Pan Xiao and Qin Li: research project—conception and execution; statistical analysis—design and execution; and manuscript preparation—writing of the first draft. Honge Gui and Bintao Xu: research project—execution; statistical analysis—execution, review, and critique; and manuscript preparation—review and critique. Xiaole Zhao and Hongyu Wang: research project—conception and organization; statistical analysis—design and execution; and manuscript preparation—writing of the first draft. Li Tao, Huiyue Chen, and Hansheng Wang: research project—execution; statistical analysis—review and critique; and manuscript preparation—review and critique. Fajin Lv and Tianyou Luo: research project—execution, and manuscript preparation—review and critique. Oumei Cheng, Jing Luo, Yun Man, and Zheng Xiao: research project—execution, and manuscript preparation—review and critique. Weidong Fang: research project—conception and organization; statistical analysis—design, execution, review, and critique; and manuscript preparation—review and critique.

Corresponding author

Correspondence to Weidong Fang.

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Xiao, P., Li, Q., Gui, H. et al. Combined brain topological metrics with machine learning to distinguish essential tremor and tremor-dominant Parkinson’s disease. Neurol Sci (2024). https://doi.org/10.1007/s10072-024-07472-1

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