Figure 3

VIP plots and S-plots. (A) VIP plot and S-plot of CON vs. STR group; (B) VIP plot and S-plot of CON vs. MMI group; (C) VIP plot and S-plot of CON vs. SMI group; (D) VIP plot and S-plot of STR vs. MMI group; (E) VIP plot and S-plot of STR vs. SMI group; F: VIP plot and S-plot of MMI vs. SMI group. VIP plot with VIP value > 1. In S-plot plot, the variables far from the origin contributed significantly to differentiate the clustering between two groups and were considered as potential biomarkers.