APOB and systemic lupus erythematosus: Compared to patients without carotid plaque, SLE patients with carotid plaque had higher concentrations of plasma triglycerides (1.5 vs. 0.9 mmol/L, p = 0.001), non-HDL-C (3.5 vs. 3.1 mmol/L, p = 0.025), apolipoprotein B (apoB) (1.0 vs. 0.9 g/L, p = 0.010) and homocysteine (13 vs. 10.5, p = 0.037).