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Table 8—

Definitions of abnormalities in albumin excretion

CategorySpot collection (μg/mg creatinine)
Normal <30 
Microalbuminuria 30–299 
Macro (clinical) albuminuria ≥300 
CategorySpot collection (μg/mg creatinine)
Normal <30 
Microalbuminuria 30–299 
Macro (clinical) albuminuria ≥300 

Because of variability in urinary albumin excretion, two of three specimens collected within a 3- to 6-month period should be abnormal before considering a patient to have crossed one of these diagnostic thresholds. Exercise within 24 h, infection, fever, congestive heart failure, marked hyperglycemia, and marked hypertension may elevate urinary albumin excretion over baseline values.

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