What are considered average estimated GFR (eGFR) values for adults?
The table below shows population estimates for mean (average) estimated glomerular filtration rate (eGFR) by age. These means, derived from the NHANES III survey of over 10,000 individuals, demonstrate that eGFR varies across age groups and that kidney function tends to decline with age. There is no difference between races or sexes when eGFRs are expressed per meter squared body surface area.
Reference Table for Population Mean eGFRs From NHANES III1
||116 mL/min/1.73 m2
||107 mL/min/1.73 m2
||99 mL/min/1.73 m2
||93 mL/min/1.73 m2
||85 mL/min/1.73 m2
||75 mL/min/1.73 m2
*For diagnostic purposes the NKDEP recommends laboratories report eGFR values greater than or equal to 60 as "≥60 mL/min/1.73 m2," not as an exact number.
Can eGFRs be used in hospitalized patients?2
Estimated GFR derived from the MDRD Study equation can be used in patients who are
in the hospital. However, it is important to pay attention to potential inaccuracies
due to the non-steady state of serum creatinine, co-morbidities that cause
malnutrition, and the use of medications that interfere with the measurement
of serum creatinine.
For additional frequently asked questions, please visit www.kidney.org/professionals/KLS/gfr.cfm#faq.
1 Coresh AJKD 41(1) 1-12.
2 Levey and Stevens, Frequently Asked Questions About GFR Estimates,
copyright National Kidney Foundation, 2004.