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[Serum lipids, HDL2 and HDL3 cholesterol and apolipoproteins A1 and B as predictors of coronary artery disease diagnosed by coronarography].

Serum levels of total, HDL2 and HDL3 cholesterol, triglycerides and apolipoproteins A1 and B were compared in 100 Chilean males with (n = 80) or without (n = 20) coronary artery disease (CAD). The presence and severity of CAD was determined by an angiographic score. Discriminating power, sensitivity, specificity and positive predictive value for CAD were calculated for all variables. As an isolated factor, total cholesterol had the greatest discriminating power (p less than 0.002): 21% of patients with CAD had cholesterol levels below 200 mg/dl while no patient with cholesterol over 275 mg/dl was free of disease. Even though all cases with HDL cholesterol below 25 mg/dl belonged in the CAD group, this factor had no overall discriminating power. Total cholesterol/HDL cholesterol ratio had the greatest discriminating power (p less than 0.001) while total/HDL2 cholesterol had the best positive predictive value.