PCSK9 plasma levels (ng/mL) had a high standard variation but did not differ between the groups regardless of the statin medication status (no statin (p = 0.258): NGT (251.6 ± 77.0), PreDM (248.5 ± 70.5) and T2D (275.5 ± 215.1); statin medication (p = 0.751): NGT (326.3 ± 136.1), PreDM (331.9 ± 74.3), T2D (315.6 ± 85.5)). This evidence concerns the gene PCSK9 and type 2 diabetes mellitus.