Proteinuria

In medicine, proteinuria is "the presence of proteins in the urine, an indicator of kidney diseases."

Spot protein/creatinine ratio
One study found that in the presence of stable renal function, a protein/creatinine ratio:
 * > 3.5 (mg/mg) indicates nephrotic-range proteinuria
 * < 0.2 is within normal limits

Spot urine albumin/creatinine ratio
In adults, albuminuria is a more sensitive than total protein in detecting chronic kidney disease from many glomerular diseases.
 * <30 mg/g is a normal albumin-creatinine ratio
 * 30-300 mg/g is microalbuminuria