Volume 76, Issue 7, Pages 784-791 (October 2009) Estimating GFR using serum beta trace protein: accuracy and validation in kidney transplant and pediatric populations  Christine A. White, Ayub Akbari, Steve Doucette, Dean Fergusson, Naser Hussain, Laurent Dinh, Guido Filler, Nathalie Lepage, Greg A. Knoll  Kidney International  Volume 76, Issue 7, Pages 784-791 (October 2009) DOI: 10.1038/ki.2009.262 Copyright © 2009 International Society of Nephrology Terms and Conditions

Figure 1 Estimation equation bias according to level of estimated GFR in ml per min per 1.73m2. Bias was calculated by subtracting the measured GFR from the estimated GFR and is expressed in ml per min per 1.73m2. The median bias is represented by the solid line and the first and third quartiles by the dashed lines. BTP, beta-trace protein; GFR, glomerular filtration rate; MDRD, Modification of Diet in Renal Disease Study. Kidney International 2009 76, 784-791DOI: (10.1038/ki.2009.262) Copyright © 2009 International Society of Nephrology Terms and Conditions