Characteristics of the study population for CAD.

<p>Data are shown as mean +/- standard deviation (SD) for quantitative variables and % for qualitative variables.</p><p>CAD: coronary artery disease; HDL-c: high density lipoprotein cholesterol levels; LDL-c, low density lipoprotein cholesterol levels; n.a: no data</p><p>*Age at the first diagnosis of the disease in CAD cases and age at enrollment for CAD controls.</p><p>^†<i>P</i> value for comparison of means for quantitative data with a student t-test, and for comparison of distribution of qualitative variables between cases and controls with a Chi-square test.</p><p>Characteristics of the study population for CAD.