Tariq Shafi, MBBS, MHS, Andrew S. Levey, MD, Lesley A

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Plasma Iohexol Clearance for Assessing Residual Kidney Function in Dialysis Patients Tariq Shafi, MBBS, MHS, Andrew S. Levey, MD, Lesley A. Inker, MD, MS, George J. Schwartz, MD, Chloe Knight, BA, Alison G. Abraham, PhD, John H. Eckfeldt, MD, PhD, Josef Coresh, MD, MHS, PhD American Journal of Kidney Diseases Volume 66, Issue 4, Pages 728-730 (October 2015) DOI: 10.1053/j.ajkd.2015.06.010 Copyright © 2015 National Kidney Foundation, Inc. Terms and Conditions

Figure 1 Comparison of clearance measurements in the Residual Kidney Function Study. (A) Scatterplot of 24-hour plasma (red dots) or urinary (blue dots) CLiohexol vs 24-hour urinary CLurea,cr. Dashed lines and shaded areas represent the linear fit and CI of the regression, respectively, of either 24-hour plasma (red) or urinary (blue) CLiohexol on 24-hour urinary CLurea,cr. (B) Plot of 24-hour CLiohexol (plasma, red; urinary, blue) minus 24-hour urinary CLurea,cr vs 24-hour urinary CLurea,cr. Positive numbers represent overestimation of 24-hour urinary CLurea,cr; negative numbers, underestimation. Dots represent the difference between clearance measures and their relation to 24-hour urinary CLurea,cr. Red and blue lines represent fit from a median quantile regression of the bias on 24-hour urinary CLurea,cr. American Journal of Kidney Diseases 2015 66, 728-730DOI: (10.1053/j.ajkd.2015.06.010) Copyright © 2015 National Kidney Foundation, Inc. Terms and Conditions