Which stage corresponds to a creatinine between 2.9-5.0 mg/dL?

• A. Stage 1
• B. Stage 2
• C. Stage 4
• D. Stage 3

Answer: (D)

Staging chronic kidney disease by creatinine levels reflects how well the kidneys are filtering. As kidney function declines, creatinine rises. In common veterinary staging references, Stage 1 is normal or near-normal creatinine with potential abnormalities, Stage 2 is mild elevation, Stage 3 is a moderate elevation, and Stage 4 is a severe elevation. A creatinine value in the 2.9–5.0 mg/dL range falls into Stage 3, indicating a substantial reduction in kidney function, but not the most extreme level. Stage 4 would be higher than 5.0 mg/dL and often involves more severe signs and risks. Remember that creatinine can be influenced by factors like muscle mass and hydration, so the stage is best considered alongside the overall clinical picture.