OBJECTIVE: To characterize the differences in various risk factors for atherosclerosis between individuals with apoB higher (H) and lower (L) than predicted from regression equation apoB vs LDL-C. METHODS: We evaluated 391 dyslipidemic subjects not treated with hypolipidemic drugs. The measured parameters included lipid profile, apolipoproteins A-1 and B, markers of insulin resistance and inflammation/hemostasis. RESULTS: Correlation coefficient between apoB and LDL-C was 0.9 (p<0.0001). Individuals with H apoB compared to L apoB had significantly higher sex and age adjusted BMI, waist circumference, insulin, HOMA (fasting insulinglucose/22.5), C-peptide, proinsulin, PAI-1, sICAM-1, sVCAM-1, t-PA, vWF, frequency of metabolic syndrome and lower values of TC, LDL-C and HDL-C (p<0.05 to <0.001 for all parameters). CONCLUSION: Individuals with apoB higher than predicted by their LDL-C levels are more insulin resistant and have more atherogenic risk profile. Thus, at least for dyslipidemic patients with high cardiometabolic risk, apoB is a more appropriate marker of risk than LDL-C.

3rd Department of Internal Medicine University Hospital Olomouc Czech Republic

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