Figure 1

Representative urinary GC/MS total ion current (TIC) chromatograms and the scores plots of PCA and PLS-DA. (A), the representative GC/MS TIC chromatogram of LUPM patient urine; (B), the representative GC/MS TIC chromatogram of HUPM patient urine; (C), PCA scores plot of QC (square), LUPM (dot), and HUPM (diamond) urines with outliers, QC sample was prepared by pooling the urine samples in this study; (D), PCA scores plots of LUPM (dot) and HUPM (diamond) urines after excluding outliers; (E), PLS-DA scores plots of LUPM (dot) and HUPM (diamond) urines after excluding outliers.