Apolipoprotein A-I as a marker of angiographically assessed coronary-artery disease.
This study was designed to determine whether the plasma level of apolipoprotein A-I is a better discriminator of angiographically documented coronary-artery disease than the level of high-density-lipoprotein (HDL) cholesterol in male subjects. The level of plasma apolipoprotein A-I in 83 patients with coronary-artery disease was 96.7 +/- 4.2 mg per deciliter (mean +/- S.E.M.), which was significantly lower (P less than 0.0001) than the level in 25 patients without coronary-artery disease (146.9 +/- 2.1 mg per deciliter). The levels of HDL cholesterol were also lower (P less than 0.0001) in patients with coronary-artery disease (31.9 +/- 1.5 mg per deciliter) than in those without it (45.9 +/- 2.3 mg per deciliter). A stepwise discriminant analysis, however, indicated the superiority of apolipoprotein A-I over HDL cholesterol in detecting coronary-artery disease. Furthermore, a linear discriminant analysis suggested that although HDL cholesterol by itself was a discriminator of coronary-artery disease, it did not provide a substantial increase in discriminatory value over that provided by apolipoprotein A-I; in contrast, apolipoprotein A-I levels added discriminatory value to the information obtained by measuring HDL cholesterol alone. We conclude that apolipoprotein A-I by itself is more useful than HDL cholesterol for identifying patients with coronary-artery disease.[1]References
- Apolipoprotein A-I as a marker of angiographically assessed coronary-artery disease. Maciejko, J.J., Holmes, D.R., Kottke, B.A., Zinsmeister, A.R., Dinh, D.M., Mao, S.J. N. Engl. J. Med. (1983) [Pubmed]
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