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. 2022 Nov 23;16:1066528. doi: 10.3389/fnins.2022.1066528

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Copyright © 2022 Zeng, Li, Jiang, Lan, Chen, Chen, Li, Hui, Zhang, Hu and Xia.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Score scatter plot of orthogonal projections to latent structures-discriminant analysis (OPLS-DA) model and permutation test of OPLS-DA model for group sham vs. the acute-phase spinal cord injury in both positive ion mode and negative ion mode. (A,B) OPLS-DA model, horizontal axis indicates the predicted principal component scores of the first principal component, demonstrating between-sample group differences, and vertical axis indicates the orthogonal principal component scores, demonstrating within-sample group differences, with each scatter representing a sample and the scatter shape and color indicating different experimental groupings. (C,D) Permutation test of OPLS-DA model shows that the model is good and no overfitting phenomenon. POS, positive ion mode; NEG, negative ion mode; ASCI, the acute-phase spinal cord injury.