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Stages of Chronic Kidney Disease

Stage	Description	GFR (mL/min/1.73 m2>)	Treatment
1	Kidney damage with normal or ↑ GFR	≥90	1-5T if kidney transplant recipient
2	Kidney damage with mild ↓ GFR	60–89
3	Moderate ↓ GFR	30–59
4	Severe ↓ GFR	15–29
5	Kidney failure	<15 (or dialysis)	5D if dialysis (HD or PD)

Abbreviations: CKD, chronic kidney disease; HD, hemodialysis; GFR, glomerular filtration rate; PD, peritoneal dialysis; ↑, increased; ↓, decreased.

Nomenclature and Description for Rating Guideline Recommendations

Strength of the Recommendation	Wording of the Recommendation	Prerequisited	Assumption	Expectation
A	An intervention “should be done”	The quality of the evidence is “high” or additional considerations support a “strong” recommendation	Most well-informed individuals will make the same choice	The expectation is that the recommendation will be followed unless there are compelling reasons to deviate from it in an individual. A strong recommendation may form the basis for a clinical performance measure
B	An intervention “should be considered”	The quality of the evidence is “high” or “moderate” or additional considerations support a “moderate” recommendation	A majority of well-informed individuals will make this choice, but a substantial minority may not	The expectation is that the recommendation will be followed in the majority of cases
C	An intervention is “suggested”	The quality of the evidence is “moderate,” “low,” or “very low” or additional considerations support a weak recommendation based predominantly on expert judgment	A majority of well-informed individuals will consider this choice	The expectation is that consideration will be given to following the recommendation