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Background: Blood lipids, such as total cholesterol (TC), LDL-cholesterol (LDL-C), and triglycerides (TG), are well-known risk factors for coronary heart disease (CHD). However, studies that examined the associations of circulating lipids and apolipoproteins carried by different lipoproteins with incident CHD remain limited, particularly among racially diverse populations. Hypothesis: Potential novel lipoprotein biomarkers, other than TC, TG, LDL-C, and HDL-C, are associated with incident CHD in diverse populations. Methods: We conducted nested case-control studies of CHD among White Americans (542 pairs; n =1084), Black Americans (622 pairs; n =1244), and Chinese adults (557 pairs; n =1114) drawn from the Southern Community Cohort Study and Shanghai Women’s and Men’s Health Studies. We examined the associations of 36 plasma lipids, lipoproteins, and apolipoproteins (measured by Bruker IVDr NMR platform) with incident CHD using conditional logistic regression, adjusted for sociodemographics, lifestyle, family history of CHD, and menopausal status (women only). Race-specific odds ratios (ORs) were pooled using fixed-effect meta-analysis. Results: TC, TG, LDL-C, and HDL-C were associated with incident CHD, with pooled ORs being 1.35, 1.31, 1.26, and 0.79 per 1-SD increase. Sixteen lipoprotein biomarkers showed larger effect sizes than those conventional lipids, with pooled ORs per 1-SD ranged from 1.37 to 1.59 and a negative OR of 0.77 ( Figure 1 ); all associations were significant within each race. Significant associations were observed across subpopulations defined by sociodemographics, lifestyle, and status of obesity, diabetes, hypertension, and dyslipidemia, including among individuals with normal levels of TC, TG, LDL-C, and HDL-C. Conclusion: Our study identified several lipoprotein biomarkers (e.g., ApoB/ApoA1 ratio and LDL-TG) associated with incident CHD among multi-racial populations, suggesting potential clinical utility complementing the current lipid panel.
Deng et al. (Tue,) studied this question.