Level 2 Weak We suggest The majority of people in your situation would want the recommended course of action, but many would not. Different choices will be appropriate for different patients. Each patient needs help to arrive at a management decision consistent with her or his values and preferences. The recommendation is likely to require substantial debate and involvement of stakeholders before policy can be determined. Grade Quality of evidence Meaning A High We are con dent that the true effect is close to the estimate of the effect. B Moderate The true effect is likely to be close to the estimate of the effect, but there is a possibility that it is substantially different. C Low The true effect may be substantially different from the estimate of the effect. D Very low The estimate of effect is very uncertain, and often it will be far from the true effect. reference keys www.kidney-international.org CURRENT CHRONIC KIDNEY DISEASE (CKD) NOMENCLATURE USED BY KDIGO CKD is de ned as abnormalities of kidney structure or function, present for > 3 months, with implications for health. CKD is classi ed based on Cause, GFR category (G1 G5), and Albuminuria category (A1-A3), abbreviated as CGA. Green, low risk (if no other markers of kidney disease, no CKD); yellow, moderately increased risk; orange, high risk; red, very high risk. GFR, glomerular ltration rate. www.kidney-international.org CKD nomenclature CONVERSION FACTORS OF CONVENTIONAL UNITS TO SI UNITS Conventional unit Conversion factor SI Unit Creatinine mg/dl 88.4 mmol/l Creatinine clearance ml/min 0.01667 ml/s Note: Conventional unit  conversion factor SI unit. ALBUMINURIA CATEGORIES IN CKD Category AER (mg/24 h) ACR (approximate equivalent) Termsa (mg/mmol) (mg/g) ACR, albumin-creatinine ratio; AER, albumin excretion rate; CKD, chronic kidney disease. a Formerly known as normoalbuminuria, microalbuminuria, and macroalbuminuria. b Relative to young adult level. 