Figure 1.

Bland–Altman plots of the differences between each approximated IDVG and original IDVG. Approximated IDVG was calculated from a formula using the increased glucose concentration above baseline at 3 min after injection of glucose [9]. Shown are the reference plasma glucose measurement (left), a conventional plasma glucose measurement (middle) and a conventional whole blood measurement (right). Solid lines represent the mean difference, and dashed lines represent the 95% confidence interval.