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Quantity quotient reporting. A proposal for a standardized presentation of laboratory results
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Rainer Haeckel
Published/Copyright:
October 1, 2009
Abstract
Laboratory results are reported in different units (despite international recommendations for SI units) together with different reference limits, of which several exist for many quantities. It is proposed to adopt the concept of the intelligence quotient and to report quantitative results as a quantity quotient (QQ) in laboratory medicine. This quotient is essentially the difference (measured result minus mean or mode value of the reference interval) divided by the observed biological variation CVo. Thus, all quantities are reported in the same unit system with the same reference limits (for convenience shifted to e.g., 80–120). The critical difference can also be included in this standardization concept. In this way the information of reference intervals and the original result are integrated into one combined value, which has the same format for all quantities suited for quotient reporting (QR). The proposal of QR does not interfere with neither the current concepts of traceability, SI units or method standardization. This proposal represents a further step towards harmonization of reporting. It provides simple values which can be interpreted easily by physicians and their patients.
Clin Chem Lab Med 2009;47:1203–6.
Keywords: critical difference; quantity quotient reporting; reference change value; standardized reporting of laboratory results
Received: 2009-5-29
Accepted: 2009-8-12
Published Online: 2009-10-01
Published in Print: 2009-10-01
©2009 by Walter de Gruyter Berlin New York
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Keywords for this article
critical difference;
quantity quotient reporting;
reference change value;
standardized reporting of laboratory results
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