PCSK9 and diabetes mellitus: The results showed a significant elevation in circulating oxidized LDL (oxLDL), soluble lectin-like oxidized LDL receptor-1 (sLOX-1), and proprotein convertase subtilisin/kexin type 9 (PCSK9) levels in T2DM patients with macrovascular complications compared to controls, prediabetes, and uncomplicated diabetes groups.