To determine the contribution of polymorphic variation in candidate genes involved in lipid metabolism in determining quantitative lipoprotein-lipid levels and cardiovascular risk factors in Anglo and Hispanic populations of the San Luis Valley in southern Colorado. The candidate genes included those for A-IV, B, D, E, H, APO(a), LDL receptor, hepatic lipase, lipoprotein lipase, lethicin cholesterol acyletransferase (LCAT), and cholesteryl ester transfer protein.