Which eGFR value indicates normal kidney function?

Which eGFR value indicates normal kidney function?

• A. ≥60 mL/min/1.73 m².
• B. ≥75 mL/min/1.73 m².
• C. ≥90 mL/min/1.73 m².
• D. ≥120 mL/min/1.73 m².

Answer: (B)

eGFR is the estimated glomerular filtration rate, a measure of how well the kidneys are filtering waste. In healthy adults, normal function is generally defined as an eGFR of 90 mL/min/1.73 m² or higher. Values below that indicate some level of reduced kidney function: 60–89 is a mild decrease (often called Stage 2 CKD if persists), 30–59 indicates moderate to more significant loss, and below 15 suggests kidney failure. So the value that indicates normal kidney function is the one at or above 90. Among the options, 75 would not be considered normal—it reflects mild reduction rather than normal function. The 120 value can occur in some individuals with hyperfiltration, but the standard threshold for normal function is 90 or higher.

eGFR is the estimated glomerular filtration rate, a measure of how well the kidneys are filtering waste. In healthy adults, normal function is generally defined as an eGFR of 90 mL/min/1.73 m² or higher. Values below that indicate some level of reduced kidney function: 60–89 is a mild decrease (often called Stage 2 CKD if persists), 30–59 indicates moderate to more significant loss, and below 15 suggests kidney failure. So the value that indicates normal kidney function is the one at or above 90. Among the options, 75 would not be considered normal—it reflects mild reduction rather than normal function. The 120 value can occur in some individuals with hyperfiltration, but the standard threshold for normal function is 90 or higher.