Table 1.

2002 National Kidney Foundation Kidney Disease Outcomes Quality Initiative staging of CKD.

Stage	Definition
Stage 1	Albuminuria with eGFR ≥ 90 mL/min/1.73 m2
Stage 2	Albuminuria with eGFR 60–89 mL/min/1.73 m2
Stage 3	eGFR 30–59 mL/min/1.73 m2
Stage 4	eGFR 15–29 mL/min/1.73 m2
Stage 5	0–15 mL/min/1.73 m2 including dialysis (5D) and transplant (5T) recipients