Urine Protein-to-Creatinine Ratio (UPCR)

A spot urine test that estimates daily urinary protein excretion without requiring a cumbersome 24-hour urine collection. The urine protein-to-creatinine ratio (UPCR) correlates closely with 24-hour urine protein (in grams/day) and is used to classify proteinuria severity, screen for nephropathy, monitor renal disease progression, and assess response to therapy.