Associations of lipoprotein parameters with low and high AOPPs, determined separately for HVs and patients with MS. Differences in lipoprotein parameters between (A) HVs with AOPPs < 34.6 μmol/L (low AOPPs) and those with AOPPs ≥ 34.6 μmol/L (high AOPPs) as well as between (B) patients with MS with AOPPs < 41.6 μmol/L (low AOPPs) and those with AOPPs ≥ 41.6 μmol/L (high AOPPs) were examined with OPLS-DA. Top 15 VIP scores reflecting contribution of parameters to model in (C) HVs and (D) patients with MS. AOPPs, advanced oxidation protein products; apoB, apolipoprotein B; C, cholesterol; FC, free cholesterol; HV, healthy volunteer; IDL, intermediate-density lipoprotein; LDL, low-density lipoprotein; MS, patient with metabolic syndrome; OPLS-DA, orthogonal partial least squares discriminant analysis; PL, phospholipid; TG, triglyceride, VIP, variable of importance projection; VLDL, very-low-density lipoprotein.