Changes of Total Cholesterol, HDL-cholesterol, Apolipoprotein A-I and A-II in School Boys and Girls

Abstract

We measured levels of total cholesterol (TC), HDL-cholesterol (HDL-C), apolipoprotein A-I (A-I) and A-II (A-II) in 371 boys and 354 girls ranging in age from 6 to 14 years. Level of TC began to decrease from age 10 and remained low level during the period of junior high school. Level of HDL-C remained constant level during the period of elementary school. In girls from age 13, level of HDL-C increased and the difference between sex appeared. Level of A-I showed similar change as the level of TC, that is, decreased from age 10 and then remained low level. Level of A-II began to decrease from age 9 and remained low level, then began to increase from age 13. A-I/A-II ratio was constant during the period of elementary school. In boys from age 13, A-I/A-II ratio began to decrease.