Affiliation:
1. Quality Assurance Unit, School of Pathology of the South African Institute for Medical Research and the University of the Witwatersrand, P. O. Box 1038, Johannesburg 2000, South Africa
Abstract
Data from 2 years' operation of an External Quality Assessment Scheme covering 14 analytes and with some 60 participants is presented. Following the trimming of discrepant results and statistical ‘outliers' (outside the range of ±3 SD from the mean), there was generally close agreement between consensus mean values for a specimen analysed on different occasions, by different groups of laboratories, or when using different analytical methods. An improvement in performance, indicated by a reduction in the average inter-laboratory coefficient of variation was found for 11 of the 14 analytes over the 2-year period.
Subject
Clinical Biochemistry,General Medicine
Cited by
7 articles.
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