ACR (approximate equivalent) Category AER(mg/24 hours) (mg/mmol) (mg/g) Terms A1 <30 <3 <30 Normal to mildly increased A2 30-300 3-30 30-300 Moderately increased* A3 >300 >30 >300 Severely Increased** Abbreviations:AER: Albumin Excretion Rate; ACR: Albumin-to-Creatine Ratio; CKD: Chronic Kidney Disease *Relative to young adult level **Including nephrotic Syndrome (albumin excretion usually > 2200mg/24 hours [ACR>2200 mg/g; >220 mg/mmol]) Reprinted by Permission from Nature Publishing Group, KDIGO 2012 Clinical Practice Guidelinefor the Evaluation and Management of Chronic Kidney Disease, Kidney International supplement 3: 28, table 6, Copyright (2013)

Table 2: Albuminuria Categories in CKD.