Fig. 1.

Meter 1 and Meter 2 Agreement – Ketones. Bland-Altman plot showing agreement between two meters for ketone measurement. Each data point is plotted on the graph with the x-value as the average ketone reading of the two meters and the y-value as the difference between the two meters for the respective reading. A y-value closer to 0 indicates a higher level of agreement. The level of agreement is assessed throughout the range of average ketone levels analyzed. The solid line represents the bias, or average difference in measurement between meters. The two dashed lines represent the limits of agreement (bias ±2SD of bias). The dotted line is the line of best fit for all of the graphed data points, described by the linear equation