Laboratory Medicine and Quality Assurance

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Fig. 2. (A–G) The trends of coefficients of variation (CVs) of the results of the participating laboratories from 2018. The significant P-values for the trends of each plot are as follows: (A) 0.016; (B) 0.041 (low only); (C) 0.013; (D) 0.044; (F) 0.010. Abbreviations: L, low concentration; M, medium concentration; H, high concentration.
Lab Med Qual Assur 2022;44:159~164
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