Analytical performance and clinical utility of a direct LDL-cholesterol assay in a hyperlipidemic pediatric population.

Journal Article

This study compares a new latex immunoseparation method for the direct determination of plasma low-density lipoprotein cholesterol (LDL-C) with the reference procedure for LDL-C (beta-quantification) in a pediatric hyperlipidemic population. The direct LDL-C assay has a mean bias of -98 mg/L in a fasting group (n = 96) of patients (mean triglycerides 1057 +/- 720 mg/L) and a bias of +177 mg/L in a nonfasting group (n = 42, mean triglycerides 4854 +/- 5457 mg/L). The mean total analytical error calculated from our data is 13.8%. The direct LDL-C assay and the commonly used Friedewald calculation respectively classified 81% and 84% of fasting patients correctly, according to the cutoffs of 1100 and 1300 mg/L for LDL-C set by the National Cholesterol Education Program for pediatric patients. Of combined fasting and nonfasting patients, 80% were correctly classified by the direct LDL-C assay. Therefore, despite several analytical shortcomings, the direct LDL-C assay may be useful in managing hyperlipidemic children without the need for a fasting specimen.

Full Text

Duke Authors

Cited Authors

  • Harris, N; Neufeld, EJ; Newburger, JW; Ticho, B; Baker, A; Ginsburg, GS; Rimm, E; Rifai, N

Published Date

  • August 1996

Published In

Volume / Issue

  • 42 / 8 Pt 1

Start / End Page

  • 1182 - 1188

PubMed ID

  • 8697574

Pubmed Central ID

  • 8697574

International Standard Serial Number (ISSN)

  • 0009-9147


  • eng

Conference Location

  • England