Table 1—

Measurement of albuminuria

NormalMicroalbuminuriaMacroalbuminuriaAdvantagesDisadvantages
Dipstick for Protein+ConvenienceDependent on level of hydration
24-h protein (mg)<150<500≥500Overcomes problem of diurnal variation in excretionSubject to collection errors
24-hour albumin (mg)<3030–300>300Overcomes problem of diurnal variation in excretionSubject to collection errors
Timed collection (μg/min)<2020–200>200Overcomes problem of diurnal variation in excretionSubject to collection errors
Spot collection (μg albumin/mg creatinine)<3030–300>300Convenience Not dependent on hydration level Most reproducibleRatios vary based on sex