Table 1.

The kidney disease outcomes quality initiative (KDOQI) stages of kidney disease.

Stage	GFR*	Description
1	90+	Normal kidney function
2	60–89	Mildly reduced kidney function
3A  3B	45–59  30–44	Moderately reduced kidney function
4	15–29	Severely reduced kidney function
5	<15 or on dialysis	Very severe or endstage kidney failure

*All GFR values are normalized to an average body surface area (BSA) of 1.73 m².