What Transplant Survival Rates Actually Mean

The Core Metric: Graft Survival Rate

The primary outcome metric reported by the Scientific Registry of Transplant Recipients (SRTR) is the graft survival rate, the percentage of transplanted organs that are still functioning at 1 year and 3 years after surgery. This is the number displayed on PlainTransplant's center pages and used in our rankings.

The ledger above is the same national benchmark field each center program table compares against. Organs sit at different heights on that scale by design of the clinical problem - not because one organ class is “better run” than another.

Risk Adjustment: Why It Matters and What It Misses

SRTR does not simply report raw survival percentages. Each center's rates are risk-adjusted using statistical models that account for patient characteristics: age, diagnosis, previous transplants, time on dialysis, donor quality, and other factors. The goal is to compare centers on an apples-to-apples basis.

What risk adjustment tells you: Whether a center's outcomes are better or worse than expected given the patients it treats. A center with a 92% survival rate that treats very sick patients may be performing better than a center with a 96% rate that selects only the healthiest candidates.

What risk adjustment misses: No statistical model captures every relevant factor. Surgical technique, post-operative care protocols, patient compliance, and access to follow-up care all influence outcomes but are difficult to measure in registry data.

Graft Survival vs. Patient Survival

These are different metrics. Graft survival asks: is the transplanted organ still working? Patient survival asks: is the patient still alive? A patient whose kidney graft fails can return to dialysis and survive, so patient survival is typically higher than graft survival for the same cohort.

For most organ types, graft survival is the more informative metric because it directly measures the success of the transplant itself.

Volume Matters: The Small Numbers Problem

Centers that perform few transplants per year have survival rates with wide statistical uncertainty. A center performing 10 kidney transplants per year where one patient has graft failure shows a 90% rate, significantly below the national average. But a single additional success or failure swings the rate by 10 percentage points. Large-volume centers (100+ transplants per year) have much more stable rates.

SRTR provides confidence intervals alongside point estimates. On PlainTransplant, we display the reported rate but encourage readers to consider volume alongside survival when evaluating centers.

What This Means for You: A Practical Framework

Step 1, Compare against the expected rate, not other centers. SRTR provides an expected rate for each center based on its patient mix. A center performing "as expected" is doing its job. Browse organ rankings.

Step 2, Check transplant volume. Higher volume generally means more reliable statistics and correlates with better outcomes. Centers below 20 transplants per year have inherently noisy data.

Step 3, Look at trends, not snapshots. If a center has consistently performed above or below expectations over multiple reporting cycles, that is meaningful.

Step 4, Consult your transplant team. Survival rates are population statistics. Your physician can evaluate how your specific situation relates to these numbers.

Frequently Asked Questions