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. 2020 Aug 21;26(31):4607–4623. doi: 10.3748/wjg.v26.i31.4607

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©The Author(s) 2020. Published by Baishideng Publishing Group Inc. All rights reserved.

This article is an open-access article which was selected by an in-house editor and fully peer-reviewed by external reviewers. It is distributed in accordance with the Creative Commons Attribution Non Commercial (CC BY-NC 4.0) license, which permits others to distribute, remix, adapt, build upon this work non-commercially, and license their derivative works on different terms, provided the original work is properly cited and the use is non-commercial.

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Metabolic profiles of serum from hepatocellular carcinoma patients, cirrhosis patients and healthy controls. A: The orthogonal partial least squares discriminant analysis (OPLS-DA) score plot for all the three groups. Model efficiency: R2X = 0.370 cum, R2Y = 0.838 cum, Q2 = 0.467 cum; B: The OPLS-DA score plot of C group and N group. R2X = 0.187 cum, R2Y = 0.790 cum, Q2 = 0.603 cum; C: The OPLS-DA score plot of Y group and N group. R2X = 0.559 cum, R2Y = 0.962 cum, Q2 = 0.696 cum; and D: The OPLS-DA score plot of C group and Y group. R2X = 0.274 cum, R2Y = 0.812 cum, Q2 = 0.358 cum. OPLS-DA: Orthogonal partial least squares discriminant analysis.