The Youden two-sample plot has been adapted for use in internal quality control in the immunoassay laboratory. It can be designed to show within-batch imprecision and drift as well as long-term between-batch reproducibility and is proposed as a method that is more economical and easily understood than other current plotting procedures.
References
1.
Quality Control in Clinical Endocrinology. Proceedings of Eighth Tenovus Workshop (Eds WilsonDWGaskellSJKempKW). Alpha Omega Publishing Ltd, Cardiff, 1981.
2.
WilsonDWGriffithsKKempKWInternal quality control of radioimmunoassays; monitoring of error. J Endocrinol1979; 80: 365–72.
3.
EdwardsRWH. Internal analytical quality control using the cusum chart and truncated V-mask procedure. Ann Clin Biochem1980; 17: 205–11.
4.
YoudenWJ. Statistical techniques for collaborative tests. In Statistical Manual of the Association of Official Analytical Chemists, Washington DC, 1975.
5.
JeffcoateSL. Efficiency and Effectiveness in the Endocrine Laboratory. London, New York: Academic Press1981.
