Figure 3
Bland-Altman plot of CL CR vs modified Cockcroft Gault formula. Comparison of the difference between the measured creatinine clearance (CLCR) and modified Cockcroft Gault (modCG) formula (as a percentage) on the y-axis, versus the average value obtained on the x-axis. The solid line represents the bias (mean percentage difference obtained across the range of values), where as the dashed lines are the limits of agreement (+/- 1.96 × standard deviation (SD)). square, Australia cohort; cross, Portugal cohort. The Spearman correlation coefficient (rs) for the percentage difference and average value is provided in the top left hand corner (outliers excluded).