eGFR Calculator Australia

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):

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1. What Is The eGFR Calculator Australia?

The eGFR Calculator Australia uses the CKD-EPI (Chronic Kidney Disease Epidemiology Collaboration) 2009 equation to estimate glomerular filtration rate (GFR) from serum creatinine, age, sex, and race. This calculator is specifically adapted for use in the Australian healthcare context.

2. How Does The Calculator Work?

The calculator uses the CKD-EPI 2009 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 provides a more accurate assessment of kidney function than older equations, especially relevant for Australian population data.

3. Importance Of eGFR Calculation

Details: Accurate GFR estimation is crucial for diagnosing chronic kidney disease in Australian patients, determining disease stage according to Australian guidelines, and guiding appropriate medication dosing.

4. Using The Calculator

Tips: Enter serum creatinine in mg/dL, age in years, select gender and race. All values must be valid (creatinine > 0, age between 1-120). This calculator follows Australian medical standards.

5. Frequently Asked Questions (FAQ)

Q1: Why Use CKD-EPI In Australia?
A: CKD-EPI is recommended in Australian guidelines as it provides more accurate GFR estimation across different population groups and is validated for Australian use.

Q2: What Are Normal eGFR Values For Australians?
A: Normal is generally ≥90 mL/min/1.73m², though values naturally decline with age. Below 60 for 3+ months indicates CKD according to Australian standards.

Q3: When Should Creatinine Be Measured In Australian Practice?
A: Morning fasting sample is ideal following Australian pathology guidelines, but random samples are acceptable in clinical practice.

Q4: Are There Limitations For Australian Indigenous Populations?
A: The equation may require adjustment for some Australian Indigenous populations. Consult local Australian renal guidelines for specific recommendations.

Q5: Is This Calculator Approved For Australian Clinical Use?
A: This calculator implements the standard CKD-EPI equation used in Australian healthcare, but always verify results with qualified Australian healthcare professionals.