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The Position Of National Surveys In Proficiency Testing Of Clinical Chemistry Laboratories.

R J Wieme, J v Egmond, L Decoussemaker

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    Summary
    This summary is machine-generated.

    Belgian clinical chemistry labs showed systematic method differences, not precision issues, in 1971-1973 proficiency surveys. External quality control highlighted the need for method or calibration changes for improvement.

    Keywords:
    External quality controlNational surveyProficiency testingQuality controlTwo-sample testYouden plot

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    Area of Science:

    • Clinical Chemistry
    • Laboratory Quality Control
    • Medical Record Standardization

    Background:

    • Proficiency testing in clinical chemistry is crucial for laboratory performance evaluation.
    • External quality control identifies systematic errors impacting diagnostic accuracy.
    • Standardizing medical records requires consistent laboratory data.

    Purpose of the Study:

    • To analyze the role of external quality control in Belgian clinical chemistry laboratories.
    • To detect systematic factors affecting uniform medical record implementation.
    • To present a new method for displaying and analyzing proficiency testing results.

    Main Methods:

    • Analysis of Belgian proficiency survey data from 1971-1973.
    • Application of the Youden approach to collaborative tests, incorporating correlation.
    • Development of a procedure for method-specific results display and analysis.

    Main Results:

    • Systematic differences, rather than precision variations, were observed between main laboratory methods.
    • Correlation analysis revealed the incidence of systematic factors.
    • The Youden plot analysis showed target areas deviating from expected circular surfaces.

    Conclusions:

    • Participating laboratories operated at the state of the art for the period.
    • Significant improvement necessitates fundamental changes in laboratory methods or calibration.
    • Expanded activities for the Belgian Society for Quality Control are recommended.