Abstract
Lower levels of plasma apolipoprotein (apo) A-I and higher levels of apoB, lipoprotein(a) (Lp(a)), and the ratio of apoB to apoA-I are considered to be independent risk factors for coronary heart disease. To examine race differences in the distributions of plasma levels of apoA-I, apoB, and Lp(a), the authors have determined quantitative levels of these traits in 252 nondiabetic Hispanics and 459 nondiabetic non-Hispanic whites (NHWs) from the San Luis Valley, Colorado. Hispanic men and women, respectively, had significantly higher plasma apoB levels (p < 0.003; p < 0.01) and the ratio of apoB to apoA-I (p < 0.003; p < 0.0003) than their NHW counterparts. Plasma Lp(a) concentrations were also significantly higher in Hispanic men (p < 0.003) and apoA-I levels were significantly lower in Hispanic women (p < 0.0003) than NHW men and women, respectively. Overall, the threshold points of apoA-I (< 120 mg/dl), apoB (> 120 mg/dl), and Lp(a) (> 25 mg/dl) were higher in Hispanics than in NHWs for apoA-I (22.8 vs. 15.7%), apoB (16.9 vs. 9.9%), and Lp(a) (18.6 vs. 12.4%). These data suggest that the quantitative risk profile for coronary heart disease with respect to these three quantitative traits is not favorable for Hispanics compared ...Continue Reading
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