Figure 4From: Unexpected random urinary protein:creatinine ratio results–limitations of the pyrocatechol violet-dye method All 24-hour PrCr results using the pyrogallol red dye from a published cohort of women with 24-hour urine collection 6 . The horizontal dotted line represents a PrCr of 30 mg/mmol, the current cut-off for detection of 0.3 g/d of proteinuria. The vertical dotted line represents a urinary creatinine concentration of 3 mmol/L.Back to article page