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Distinguishing Schizophrenia and Bipolar Disorder Through a Multiclass Classification Model Based on Multimodal Neuroimaging Data.

Ming Chen,Xiaowei Xia,Zhuang Kang,Zhinan Li,Jiamin Dai,Junyan Wu,Cai Chen,Yong Qiu,Tong Liu, Yanxi Liu, Ziyi Zhang, Qingni Shen, Sichu Tao, Zixin Deng,Ying Lin,Qinling Wei

JOURNAL OF PSYCHIATRIC RESEARCH(2024)

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Abstract
This study aimed to identify neural biomarkers for schizophrenia (SZ) and bipolar disorder (BP) by analyzing multimodal neuroimaging. Utilizing data from structural magnetic resonance imaging (sMRI), diffusion tensor imaging (DTI), and resting-state functional magnetic resonance imaging (rs-fMRI), multiclass classification models were created for SZ, BP, and healthy controls (HC). A total of 113 participants (BP: 31, SZ: 39, and HC: 43) were recruited under strict enrollment control, from which 272, 200, and 1875 features were extracted from sMRI, DTI, and rs-fMRI data, respectively. A support vector machine (SVM) with recursive feature elimination (RFE) was employed to build the models using a one-against-one approach and leave-one-out cross-validation, achieving a classification accuracy of 70.8%. The most discriminative features were primarily from rs-fMRI, along with significant findings in sMRI and DTI. Key biomarkers identified included the increased thickness of the left cuneus cortex and decreased regional functional connectivity strength (rFCS) in the left supramarginal gyrus as shared indicators for BP and SZ. Additionally, decreased fractional anisotropy in the left superior fronto-occipital fasciculus was suggested as specific to BP, while decreased rFCS in the left inferior parietal area might serve as a specific biomarker for SZ. These findings underscore the potential of multimodal neuroimaging in distinguishing between BP and SZ and contribute to the understanding of their neural underpinnings.
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Key words
Neuroimaging Data Analysis,Neuroimaging
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