Figure 3.

(A) Scatterplot indicating the relationship between plasma glucose concentration ([gluc]) measured by an electrochemical point‐of‐care meter versus the plasma [gluc] measured by the reference method for 89 Holstein‐Friesian cattle on the day of parturition. The dashed diagonal line is the line of identity, and the solid line is the line of best fit from Deming regression. (B) Bland–Altman plot of the difference between [gluc] measured by the electrochemical meter and [gluc] measured by the reference method against the mean [gluc] for both methods. The solid horizontal line is the mean bias and the two horizontal dashed lines represent the 95% confidence interval for agreement. The plot indicates that bias increased linearly as mean [gluc] increases.