eGFR Calculator Race

CKD-EPI Equation:

\[ eGFR = 141 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.209} \times 0.993^{age} \times (1.018 \text{ if female}) \times (1.159 \text{ if black}) \]

Serum Creatinine (Scr):

mg/dL

Age:

years

Gender:

Race:

Estimated GFR (eGFR):

Unit Converter ▲

Unit Converter ▼

From:	To:

1. What Is The eGFR Calculator Race?

The eGFR Calculator Race estimates glomerular filtration rate (GFR) using the CKD-EPI equation that incorporates race as a factor. This calculator provides accurate kidney function assessment based on serum creatinine, age, sex, and race.

2. How Does The Calculator Work?

The calculator uses the CKD-EPI equation:

\[ eGFR = 141 \times \min(Scr/\kappa, 1)^\alpha \times \max(Scr/\kappa, 1)^{-1.209} \times 0.993^{age} \times (1.018 \text{ if female}) \times (1.159 \text{ if black}) \]

Where:

\( Scr \) — Serum creatinine (mg/dL)
\( \kappa \) — 0.7 (female) or 0.9 (male)
\( \alpha \) — -0.329 (female) or -0.411 (male)
\( age \) — Age in years
1.018 — Female multiplier
1.159 — Black race multiplier

Explanation: This equation accounts for demographic differences in creatinine production and muscle mass, providing more personalized eGFR estimates.

3. Importance Of eGFR Calculation

Details: Accurate GFR estimation is essential for chronic kidney disease diagnosis, staging, and appropriate medication dosing decisions.

4. Using The Calculator

Tips: Enter serum creatinine in mg/dL, age in years, select gender and race. Ensure all values are valid (creatinine > 0, age between 1-120 years).

5. Frequently Asked Questions (FAQ)

Q1: Why Include Race In eGFR Calculation?
A: Race is included because studies show differences in creatinine metabolism and muscle mass across racial groups, affecting eGFR accuracy.

Q2: What Are Normal eGFR Values?
A: Normal eGFR is generally ≥90 mL/min/1.73m². Values below 60 for 3+ months indicate chronic kidney disease.

Q3: When Should Creatinine Be Measured?
A: Morning fasting samples are preferred, but random samples are acceptable. Avoid testing after high-protein meals or strenuous exercise.

Q4: Are There Limitations To Race-Based Equations?
A: Recent discussions highlight concerns about race-based medicine. Some institutions are transitioning to race-neutral equations.

Q5: Should This Be Used For Drug Dosing?
A: For precise drug dosing, especially with narrow therapeutic windows, measured GFR may be necessary in specific populations.