Differences between measured and estimated creatinine-based eGFR at different eGFR thresholds

The eGFR_CR is calculated from the CKD-EPI race-free creatinine equation, and the selected values (15, 30, 45, 60, and 90 mL/min/1.73 m²) correspond to the guideline-recommended thresholds for CKD staging. Each vertical bar corresponds to the probability that mGFR exceeds the eGFR_CR plus or minus a certain range on an absolute scale. A difference greater than ±5 mL/min/1.73 m² implies that at a given eGFR, the mGFR is outside of a 10 mL/min/1.73 m² range of the eGFR value; ±10 corresponds to a range of 20 mL/min/1.73 m² and ±15 to a range of 30 mL/min/1.73 m².