Substages of Chronic Kidney Disease Based on Proteinuria

Urine protein:creatinine ratio

Substagea

Nonproteinuric

Borderline Proteinuric

Proteinuric

Dogs

< 0.2

0.2–0.5

> 0.5

Cats

< 0.2

0.2–0.4

> 0.4

aStages recommended by the International Renal Interest Society.