Figure 2 | Scientific Reports

Figure 2

From: Validity of different copeptin assays in the differential diagnosis of the polyuria-polydipsia syndrome

Figure 2

Inter-assay difference in copeptin concentrations in healthy volunteers. Bland–Altman graph of inter-assay difference in copeptin concentrations in healthy volunteers for (a) the KRYPTOR vs LIA, (b) the KRYPTOR vs ELISA and (c) the LIA vs ELISA. The dotted middle line represents the mean difference in copeptin concentrations between the two different assays ((a): 5.51 pmol/l (95% limits − 4.16 to 15.18), (b): − 30.8 pmol/l (95% limits − 60.63 to − 1.03), (c): − 36.34 pmol/l (95% limits − 63.37 to − 9.32)). The outer dotted lines represent the 95% confident interval limits of agreement. (a) KRYPTOR vs LIA, (b) KRYPTOR vs ELISA, (c) LIA vs ELISA.

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