NKF-K/DOQI classification of the stages of chronic kidney disease (CKD).

Table 1: NKF-K/DOQI classification of the stages of chronic kidney disease (CKD).

Stage	GFR (mL/min/1.73 m²)	Description	Action plan^*
1	≥ 90	Kidney damage with normal or increased GFR	Treat primary and comorbid conditions
1	≥ 90	Kidney damage with normal or increased GFR	Slow CKD progression, CVD risk reduction
2	60-89	Kidney damage with mild reduction of GFR	Estimate rate of progression of CKD
3	30-59	Moderate reduction of GFR	Evaluate and treat complications
4	15-29	Severe reduction of GFR	Prepare for kidney replacement therapy
5	< 15 (or dialysis)	Kidney failure	Kidney replacement therapy

NKF: The National Kidney Foundation; K/DOQI: Kidney Disease Outcomes Quality Initiative; GFR: Glomerular Filtration Rate (millilitres per minute per 1.73-meter square of body surface area);

CVD: Cardiovascular Disease. ^*The actions that are listed in the more severe stages of CKD also include actions from less severe stages.