Categories
Measure	Normal to mildly increased (A1)	Moderately increased (A2)	Severely increased (A3)
AER (mg/24 hours)	< 30	30 to 300	> 300
PER (mg/24 hours)	< 150	150 to 500	> 500
ACR (mg/mmol) (mg/g)	< 3 < 30	3 to 30 30 to 300	> 30 > 300
PCR (mg/mmol) (mg/g)	< 15 < 150	15 to 50 150 to 500	> 50 > 500
Abbreviations: A1 ‐ A3: albuminuria categories; ACR: albumin‐to‐creatinine ratio; AER: albumin excretion rate; PCR: protein‐to‐creatinine ratio; PER: protein excretion rate. Relationships among measurement methods within a category are not exact. The relationships between AER and ACR and between PER and PCR are based on the assumption that average creatinine excretion rate is approximately 1.0 g per day or 10 mmol per day. Creatinine excretion varies with age, sex, race and diet; therefore the relationship among these categories is approximate only. The conversions are rounded for pragmatic reasons.