PEDIATRICS Vol. 78 No. 2 August 1986, pp. 189-200
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Serum Apolipoproteins A-I and B in 2,854 Children From a Biracial Community: Bogalusa Heart Study

Sathanur R. Srinivasan PhD1, David S. Freedman PhD1, Chakravarthi Sharma PhD1, Larry S. Webber PhD1, and Gerald S. Berenson MD1

1 From the Departments of Medicine, Biochemistry, Public Health and Preventive Medicine, and Biometry and Genetics, Louisiana State University Medical Center, New Orleans

Serum apolipoprotein A-I (apo A-I) and apolipoprotein B (apo B) profiles were examined in 2,854 children, 5 to 17 years of age, from a total biracial community. Black boys had higher apo A-I levels than white boys (P < .001), whereas girls showed no such racerelated difference. Black-white difference in apo A-I persisted among boys with similar triglyceride levels provided that triglyceride levels were high. The ratio of highdensity lipoprotein cholesterol (HDL-C)/apo A-I was higher in black than in white children, irrespective of sex (P < .001). Only black children showed sex-related differences for apo A-I (boys > girls, P < .05). Sex-related differences were seen in white children for HDL-C/apo A-I ratio (boys > girls, P < .001) and in children of both races for apoB (girls > boys, P < .01). Age-related changes were more apparent for apo A-I and HDL-C/apo A-I ratio than for apo B. A progressive decrease in apo A-I was noted during sexual maturation only in white boys. The magnitude of inverse association of apo B to HDL-C was less strong in black children (P < .01). Although apo A-I was inversely correlated with very low-density lipoprotein cholesterol and triglycerides in white children, no association was noted in black children. These findings are indicative of intrinsic metabolic differences among the race-sex groups, resulting in variability in lipoprotein composition and levels and atherogenic potential.

Key Words: apolipoprotein A-I • apolipoprotein B

Submitted on May 28, 1985
Accepted on November 21, 1985




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