Bland-Altman comparison of plasma clearance GFR and Renal clearance GFR during CILDI. Difference is measured in mL/min/1.73 m2. Bias = −7.1 mL/min/1.73 m2, SD of bias = 7.3, 95% Limits of agreement = −21.5 to +7.2 mL/min/1.73 m2. n = 9. Although based on small numbers sub-group analysis suggests a smaller bias in the HV group. In the HV group bias was −0.5 mL/min/1.73 m2 (limits of agreement −10.0 to +8.9 mL/min/1.73 m2); in the CKD group bias was −12.4 mL/min/1.73 m2 (limits of agreement −19.0 to −5.8 mL/min/1.73 m2).