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Fig. 3.

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Fig. 3.

Validation charts for selected optimal patient-based QC procedures for the hs-cTnT assay. (A) MA procedure,(B) MR procedure with a cut-off value of 5 ng/L, (C) MR procedure with a cut-off value of 14 ng/L, and (D) MR procedure with a cut-off value of 52 ng/L. The graphs show the median number of assay results needed for bias detection (MNPed) as bars, and the minimum/maximum number of results needed for bias detection as error bars. The introduced bias is plotted on the X-axis and the MNPed on the Y-axis. Graphs in panels A–C used block sizes of 100, and those in D used a block size of 200. The lower and upper truncation limits for MA procedure are 3 and 150 ng/L, respectively. The dashed line represents the average daily run size of 180 patient results.

Abbreviations: hs-cTnT, high-sensitivity cardiac troponin T; MA, moving average; MR, moving rate; QC, quality control.

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