Reference Range
Microalbuminuria is defined as excretion of 30–300 mg of albumin per 24 hours (or 20–200 mcg/min or 30–300 mcg/mg creatinine) on 2 of 3 urine collections.
The detection of low levels of albumin excretion (microalbuminuria) has been linked to the identification of incipient diabetic kidney disease. This phase calls for aggressive management to prevent or retard overt diabetic nephropathy.
The reference ranges for microalbumin are detailed in the table below.
Table 1. American Diabetic Association Classification of Microalbuminuria (Open Table in a new window)
|
Spot Collection |
Timed Collection |
24-hr Collection |
Category |
|
Less than 30 mcg/mg creatinine |
Less than 20 mcg/min |
Less than 30 mg |
Normal |
|
30-300 mcg/mg creatinine |
20-200 mcg/min |
30-300 mg |
Microalbuminuria |
|
More than 300 mcg/mg creatinine |
More than 200 mcg/min |
More than 300 mg |
Clinical albuminuria |