Fig. 2.

GFR and albuminuria grid illustrating the risk of progression by color intensity. The number in each box suggests the frequency of monitoring (number of times per year). Green indicates stable disease with annual follow-up measurements if CKD is present; yellow indicates caution and calls for ≥1 measurement per year; orange requires 2 measurements per year; red calls for 3 measurements per year, and deep red may require close monitoring at a frequency of 4 times or more per year (at least every 1-3 months). These general parameters are based on expert opinion and must take into account underlying comorbid conditions and disease state, as well as the likelihood of a change in management for any individual patient. CKD = chronic kidney disease; GFR = glomerular filtration rate. Frequency of recommendations from the KDIGO CKD Workgroup (30 [EL 4; NE]; 31 [EL 4; NE]). Modified and reprinted with permission from Macmillan Publishers Ltd: Kidney International 2011;80(1):17-28, copyright 2011.