Figure 1.

Linearity under dilution of renal biomarker concentration in a serially diluted canine serum sample, measured using a commercial multiplex immunoassay. Each data point is the mean of a triplicate measurement. The solid line is the linear correlation between expected and observed values, and dotted lines indicate the 95% CI. Observed values were statistically correlated with the expected value according to a linear model, as demonstrated by the “lack of fit” test. A. Cystatin C. B. Kidney injury molecule 1. C. Neutrophil gelatinase–associated lipocalin.