HP and type 2 diabetes mellitus: Statistical evaluation of the data revealed a feature set matrix using one glycation site of haptoglobin (K141) and twelve routine parameters typically used to characterize T2DM (FPG, HbA1c, FPI, C-peptide) and IR (HOMA-IR, FFAs) [44], providing a high accuracy of 95% for the cohort, which confirms our previous results [42].