KDIGO 2012 Clinical Practice Guideline for the Evaluation and Management of Chronic Kidney Disease

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1.1: DEFINITION OF CKD
1.1.1: CKD is defined as abnormalities of kidney structure or function, present for43 months, with implications for health. (Not Graded)
1.2: STAGING OF CKD
1.2.1: We recommend that CKD is classified based on cause, GFR category, and albuminuria category (CGA). (1B)
1.2.2: Assign cause of CKD based on presence or absence of systemic disease and the location within the kidney of
observed or presumed pathologic-anatomic findings. (Not Graded)
1.2.3: Assign GFR categories as follows (Not Graded):
1.2.4: Assign albuminuria* categories as follows (Not Graded):
*note that where albuminuria measurement is not available, urine reagent strip results can be substituted (Table 7)
1.3: PREDICTING PROGNOSIS OF CKD
1.3.1: In predicting risk for outcome of CKD, identify the following variables: 1) cause of CKD; 2) GFR category;
3) albuminuria category; 4) other risk factors and comorbid conditions. (Not Graded)
Criteria for CKD (either of the following present for 43 months)
Markers of kidney damage (one or more) Albuminuria (AER Z30 mg/24 hours; ACR Z30 mg/g [Z3 mg/mmol])
Urine sediment abnormalities
Electrolyte and other abnormalities due to tubular disorders
Abnormalities detected by histology
Structural abnormalities detected by imaging
History of kidney transplantation
Decreased GFR GFR o60 ml/min/1.73 m2 (GFR categories G3a–G5)
Abbreviations: CKD, chronic kidney disease; GFR, glomerular filtration rate.

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