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Clinical Chemistry 36: 255-260, 1990;
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Clinical Chemistry, Vol 36, 255-260, Copyright © 1990 by American Association for Clinical Chemistry

Cholesterol screening: comparative evaluation of on-site and laboratory- based measurements

PS Bachorik, R Rock, T Cloey, E Treciak, D Becker and W Sigmund
Department of Pediatrics and Laboratory Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21205.

We measured cholesterol in capillary blood samples from 9683 volunteers over a four-day on-site community screening program, using the "Reflotron" desk-top analyzer (Boehringer-Mannheim Diagnostics, Indianapolis, IN). We also measured cholesterol in venous blood samples from 3% of those screened (a) with the Reflotron at the screening sites, (b) in a qualified hospital clinical laboratory, and (c) in a Centers for Disease Control standardized lipoprotein research laboratory. The sensitivity (and specificity) of the Reflotron measurements, with use of the lipoprotein laboratory measurements as the point of reference, was 0.95 (0.73) in capillary blood samples and 0.88 (0.93) in venous blood samples, compared with 0.99 (0.87) in the hospital clinical laboratory. The Reflotron measurements correlated less well with the lipoprotein laboratory values in both venous blood (r = 0.91) and capillary blood (r = 0.89) samples than did the clinical laboratory values (r greater than 0.99). Furthermore, the capillary blood measurements averaged 7% higher than venous measurements when both kinds of samples were analyzed in the Reflotron.




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Copyright © 1990 by the American Association for Clinical Chemistry.