Serum lipids and apolipoproteins in Spanish children and adolescents: a 5 year follow‐up

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Abstract
This study was designed to assess "tracking" of serum lipids and apolipoproteins in three age groups of Spanish children over a 5 year period. A total of 84 6-year-old, 89 10-year-old and 64 14-year-old children were evaluated in 1989 (with measurement of serum total cholesterol, triglycerides, lipoproteins and apolipoproteins A1 and B), and re-evaluated in 1994. Correlation coefficients between initial and final lipid and apolipoprotein values were as follows: total cholesterol, 0.66; low-density lipoprotein (LDL) cholesterol, 0.65; high-density lipoprotein (HDL) cholesterol, 0.61; triglycerides, 0.61; apolipoprotein A1, 0.60; apolipoprotein B, 0.66. When age groups were analysed separately, children who were 14 years old at the beginning of the study showed higher correlation coefficients, particularly for total cholesterol and LDL cholesterol ( > 0.7 in both cases). More than 70% of children who were in the top quintile of total, LDL or HDL cholesterol as well as apolipoprotein A1 or B in 1989 remained in the top quintile 5 years later.