Estimated Post Transplant Survival Calculator

EPTS Equation:

\[ EPTS = 0.047 \times \max(Age-25,0) - 0.015 \times Diabetes \times \max(Age-25,0) + 0.398 \times Prior\ Transplant - 0.237 \times Diabetes \times Prior\ Transplant + 0.315 \times \log(Dialysis\ Years +1) - 0.099 \times Diabetes \times \log(Dialysis\ Years +1) + 0.13 \times Diabetes + 1.262 \times Dialysis\ Years \]

Age:

years

Diabetes:

Prior Transplant:

Dialysis Years:

years

EPTS Score:

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1. What is the EPTS Score?

The Estimated Post Transplant Survival (EPTS) score predicts how long a patient is likely to need a kidney transplant. It's used in kidney allocation systems to match kidneys with recipients who will benefit the longest from them.

2. How Does the Calculator Work?

The calculator uses the EPTS equation:

Where:

\( Age \) — Patient's age in years
\( Diabetes \) — 1 if diabetic, 0 if not
\( Prior\ Transplant \) — 1 if prior transplant, 0 if not
\( Dialysis\ Years \) — Time on dialysis in years

Explanation: The equation accounts for factors that influence post-transplant survival including age, diabetes status, prior transplants, and time on dialysis.

3. Importance of EPTS Calculation

Details: The EPTS score is used in kidney allocation systems to prioritize recipients who are expected to benefit the longest from a transplant. Lower scores indicate better predicted post-transplant survival.

4. Using the Calculator

Tips: Enter age in years, select diabetes status (yes=1, no=0), prior transplant status (yes=1, no=0), and time on dialysis in years. All values must be valid.

5. Frequently Asked Questions (FAQ)

Q1: What is a good EPTS score?
A: Lower scores are better. Scores range from 0% to 100%, with lower scores indicating better predicted post-transplant survival.

Q2: How is EPTS used in kidney allocation?
A: Kidneys from younger donors are preferentially allocated to candidates with lower EPTS scores (better predicted survival).

Q3: What factors most affect EPTS score?
A: Time on dialysis and age have the largest impacts on the score.

Q4: Does EPTS predict actual survival?
A: It predicts relative survival compared to other transplant candidates, not absolute survival time.

Q5: How often should EPTS be recalculated?
A: It should be updated whenever there are significant changes in the patient's status or annually.