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Table. 1.

Intra-laboratory and inter-laboratory %CVs of insulin and C-peptide measurements

Samples Insulin C-peptide


Target (nmol/L) Intra-laboratory %CV Inter-laboratory %CV Target (nmol/L) Intra-laboratory %CV Inter-laboratory %CV


Range Mean Range Mean
202111 0.071 0.7–21.8 3.4 64.3 0.319 0.0–8.8 2.5 21.8
202112 0.123 0.7–18.0 2.8 8.4 0.937 0.3–10.1 2.3 17.4
202113 0.357 0.2–15.7 2.4 13.1 2.376 0.3–10.7 2.3 14.8
202114 0.386 0.5–15.6 2.5 10.0 3.081 0.3–11.1 2.3 14.4
202115 0.932 0.3–16.5 2.2 13.3 4.308 0.3–8.1 2.2 13.6

Abbreviations: Intra-lab, intra-laboratory; Inter-lab, inter-laboratory.

Ann Lab Med 2022;42:428~437 https://doi.org/10.3343/alm.2022.42.4.428

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