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The International Federation of Clinical Chemistry and Laboratory Medicine. Via Carlo Farini 81. 20159 Milano. Italy. ifcc@ifcc.org. eAcademy. eJIFCC. eNews. Executive Board and Council.
A process is described to assess the commutability of a reference material (RM) intended for use as a calibrator, trueness control, or external quality assessment sample based on the difference in bias between an RM and clinical samples (CSs) measured using 2 different measurement procedures (MPs). ….
Similarly, commutability of trueness controls or external quality assessment samples is essential when those materials are used to assess trueness of results for CSs. This report is part 1 of a 3-part series describing how to assess commutability of RMs.
IFCC Working Group Recommendations for Assessing Commutability Part 3: Using the Calibration Effectiveness of a Reference Material. Clin Chem. 2018 Mar;64 (3):465-474. doi: 10.1373/clinchem.2017.277558. Epub 2018 Jan 18. Authors.
1 de mar. de 2018 · In this part, we describe the common requirements for the experimental design. In parts 2 and 3, we present 2 different statistical approaches for assessment of commutability. Part 2 is suitable for use when an RM is intended for use as a calibrator, a trueness control, or an EQA material ( 1 ).
1 de mar. de 2018 · In the following description, an example data set is used to illustrate the process of assessing RM commutability by the RM's effectiveness to improve the agreement of results for a set of CSs after recalibration of the MPs with the RM. The analyses described assume ≥32 CSs ( 6) and ≤20 MPs ( 7 ).
18 de ene. de 2018 · The statistical ap-proaches in parts 2 and 3 in this series present commut-ability assessment procedures that can use criteria based on medically relevant differences in results between an RM and CSs (1, 2). An example of commutability assessment based on the approach in part 2 of this series is shown in Fig. 1.
