Figure 2

Bland Altman plot illustrates a mean difference of 0.2 mg/dL, equal to 0.4 % in creatinine concentration measured. There is also an impact of the creatinine concentration on the direction and extent of this difference between both assays. A higher creatinine urine concentration (>25 mg/dL) results in a higher enzymatic compared to a Jaffe assay, while the reverse is true in lower urine concentrations (<10 mg/dL) (X-axis = mean of all, mg/dL; Y-axis = difference [creatine in urine, Jaffe – creatinine in urine, enzymatic/mean of all]).