APOB and diabetes mellitus: There was a close correlation between mean Lp(a), ApoB/ApoA-I ratio, and LDL-C/HDL-C ratio with serum glucose, blood HbA1C, and HOMA-IR in individuals with prediabetes. The study's findings could pave the way for longitudinal studies to track changes in lipoprotein ratios over time and their impact on diabetes progression and cardiovascular outcomes.