State of the art in trueness and interlaboratory harmonization for 10 analytes in general clinical chemistry

W. Greg Miller, Gary L. Myers, Edward R. Ashwood, Anthony A. Killeen, Edward Wang, Glenn W. Ehlers, David Hassemer, Stanley F. Lo, David Seccombe, Lothar Siekmann, Linda M. Thienpont, Alan Toth

Research output: Contribution to journalArticlepeer-review

75 Scopus citations


Context. - Harmonization and standardization of results among different clinical laboratories is necessary for clinical practice guidelines to be established. Objective. - To evaluate the state of the art in measuring 10 routine chemistry analytes. Design. - A specimen prepared as off-the-clot pooled sera and 4 conventionally prepared specimens were sent to participants in the College of American Pathologists Chemistry Survey. Analyte concentrations were assigned by reference measurement procedures. Participants. - Approximately 6000 clinical laboratories. Results. - For glucose, iron, potassium, and uric acid, more than 87.5% of peer groups meet the desirable bias goals based on biologic variability criteria. The remaining 6 analytes had less than 52% of peer groups that met the desirable bias criteria. Conclusions. - Routine measurement procedures for some analytes had acceptable traceability to reference systems. Conventionally prepared proficiency testing specimens were not adequately commutable with a fresh frozen specimen to be used to evaluate trueness of methods compared with a reference measurement procedure.

Original languageEnglish (US)
Pages (from-to)838-846
Number of pages9
JournalArchives of Pathology and Laboratory Medicine
Issue number5
StatePublished - May 2008


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