A comprehensive analysis of nearly 1.5 million adult patients over nearly four decades reveals dramatic improvements in survival after organ transplant, though a persistent and growing shortage of donor organs remains a critical challenge.
A national study of the UNOS database, covering listings from 1987 to 2024, found substantial increases in one-year survival after listing for all solid organs. The findings represent a major leap in the effectiveness of transplant medicine.
One-Year Survival After Listing (Intent-to-Treat)
- Lung: 38% to 84%
- Heart: 63% to 90%
- Liver: 70% to 85%
- Kidney: 82% to 95%
- Pancreas: 84% to 95%
One-Year Survival After Transplant also improved across all organs. Notably, kidney transplants from living donors showed consistently higher survival rates than those from deceased donors.
Unmet Need: A Tale of Two Trends
While survival is up, the gap between demand and supply is shifting. The unmet need—the difference between patients waitlisted and transplants performed—declined for most organs:
- Liver: ~40% reduction
- Heart & Pancreas: ~50% reduction
- Lungs: ~80% reduction since the late 1990s
However, kidney transplant faced the highest and most persistent unmet need, increasing by approximately 350–400% over three decades. This surged from about 4,000 patients in 1988 to roughly 18,500 in 2023.
Approximately 13 people die each day waiting for a transplant, and over 100,000 adults and children remain on the waiting list.
Why Survival Improved
The authors attribute these gains to advances in anesthesia, critical care medicine, infectious disease management, organ preservation strategies, and expanded donation criteria.
Study Limitations
The analysis is limited by the UNOS database, which may not fully capture regional differences, proximity to transplant centers, or socioeconomic factors. Changes in transplant eligibility criteria and donor/recipient risk factors were also not accounted for.
Researcher Statements
"These metrics provide a comprehensive snapshot of how well the system is keeping up with demand." — Carter Burns, first author
"Organ transplant patients are living longer before and after surgery thanks to several clinical and technical innovations. But there remains a significant need for organ donations." — Dr. Abbas Rana, senior author