APOB and diabetes mellitus: FSG: fasting serum glucose; HOMA-IR: hemostasis model assessment of insulin resistance; LDL/HDL-C: high-density lipoprotein cholesterol/low-density lipoprotein cholesterol ratio; ApoB/ApoA: apolipoprotein A/apolipoprotein B ratio; BMI: body mass index; DM: diabetes mellitus.