Looking for more details? Read our comprehensive eGFR guide
What is eGFR?
Estimated Glomerular Filtration Rate (eGFR) is a blood test that checks how well your kidneys are filtering blood. It is considered the best overall index of kidney function in health and disease.
CKD Stages based on eGFR
- Stage 1: Normal or high ≥ 90
- Stage 2: Mildly decreased 60 – 89
- Stage 3a: Mild to moderately decreased 45 – 59
- Stage 3b: Moderate to severely decreased 30 – 44
- Stage 4: Severely decreased 15 – 29
- Stage 5: Kidney failure < 15
Case Scenario
Case: A 60-year-old female presents with a serum creatinine of 1.4 mg/dL.
Calculation: Using the 2021 CKD-EPI formula for a 60-year-old female with Scr 1.4 mg/dL.
Result: eGFR = 47 mL/min/1.73m²
Action: This indicates Stage 3a Chronic Kidney Disease. A review of potentially nephrotoxic medications, blood pressure control, and follow-up lab testing is warranted.
Frequently Asked Questions
In 2021, the NKF and ASN recommended moving to the CKD-EPI 2021 equation, which removes the race modifier to avoid contributing to health disparities.
No, the CKD-EPI equation is validated for adults (age 18+). The Bedside Schwartz equation is typically used for pediatric patients.
How to Use
Enter the patient's age, serum creatinine, and sex. Depending on the equation selected (e.g., CKD-EPI 2021), the tool will provide the estimated Glomerular Filtration Rate.