APOB and type 1 diabetes mellitus: The LDL/HDL cholesterol ratio displayed the largest reduction of all the variables in the T1DM group (1.4-fold, Fig. 1A–B), which aligned with a decreased ApoB100/A1 ratio, where ApoB100 and A1 are the apolipoprotein fractions of non-HDL (LDL, IDL and VLDL) and HDL particles, respectively (Fig. 1A–B).