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. 2017 Apr 1;13(5):61. doi: 10.1007/s11306-017-1199-6

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© The Author(s) 2017

Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

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Fig. 5 — A marker panel of five metabolites discriminates PDAC and CP. a Score scatter plot for the refined OPLS-DA model of the five discriminative metabolites with consistent fold-change directions in the validation cohort (Fig. 1, step 4b and 5). Orange dots represent PDAC samples (n = 20); white dots represent CP samples (n = 31); t1 on the x-axis, first component; to1 on the y-axis, first (and only) orthogonal component. Model parameters: CV-groups, 5; R2X(cum) 0.736; Q2(cum) 0.513; CV-ANOVA p = 8.2E-07. b Corresponding loading scatter plot. All five metabolites in the marker panel show increased levels in PDAC compared to CP