A patient with an estimated GFR of 28 mL/min/1.73 m2 has CKD stage:

A patient with an estimated GFR of 28 mL/min/1.73 m2 has CKD stage:

• A. Stage 2
• B. Stage 3
• C. Stage 4
• D. Stage 5

Answer: (C)

Staging CKD uses the estimated GFR to categorize how well the kidneys are filtering. An eGFR of 28 mL/min/1.73 m2 falls in the 15–29 range, which corresponds to stage 4 CKD. This stage reflects a severe decrease in kidney function, distinguishing it from stage 3 (roughly 30–59), stage 2 (60–89), and stage 5 (<15 or dialysis-dependent). Recognizing stage 4 signals the need for close monitoring, management of complications, and planning for potential kidney replacement therapy if the function declines further.

Staging CKD uses the estimated GFR to categorize how well the kidneys are filtering. An eGFR of 28 mL/min/1.73 m2 falls in the 15–29 range, which corresponds to stage 4 CKD. This stage reflects a severe decrease in kidney function, distinguishing it from stage 3 (roughly 30–59), stage 2 (60–89), and stage 5 (<15 or dialysis-dependent). Recognizing stage 4 signals the need for close monitoring, management of complications, and planning for potential kidney replacement therapy if the function declines further.