APOB and coronary artery disorder: In the highest LDL-C quartile, the percentage of CHD was not always the highest, such as the percentage of CHD in quartile 4 of LDL-C and quartile 1 of apoB/apoA1 ratio was lower than that in quartile 1 of LDL-C and quartile 4 of apoB/apoA1 ratio, and in quartile 1 of LDL-C, and the percentage of CHD in quartile 4 of apoB/apoA1 ratio was almost twice greater than that in quartile 1 of apoB/apoA1 ratio.