First-Year Waitlist Hospitalization and Subsequent Waitlist and Transplant Outcome

Area of Science:

• Nephrology
• Transplantation
• Health Services Research

Background:

• Frailty in kidney transplant candidates is linked to worse survival and higher costs.
• Current frailty assessments are resource-intensive and require direct patient contact.
• Waitlist hospitalization may serve as a practical proxy for patient fitness.

Purpose of the Study:

• To investigate if waitlist hospitalization can predict posttransplant outcomes and resource utilization in end-stage renal disease patients.
• To evaluate the utility of hospitalization data in improving kidney transplant allocation policies.

Main Methods:

• Analysis of United States Renal Data System data for 51,111 adult end-stage renal disease patients waitlisted for kidney transplant (2000-2011).
• Examined the association between hospitalization frequency during the waitlist period and subsequent mortality, resource requirements, and transplant likelihood.
• Compared the predictive performance of a model incorporating waitlist admissions against estimated posttransplant survival.

Main Results:

• Higher waitlist hospitalization rates correlated with increased resource needs, higher waitlist mortality (HRs ranging from 1.24 to 2.07), and reduced transplant likelihood.
• Graft and recipient survival were inferior in more heavily admitted patients, though transplant still offered a survival benefit.
• A model using waitlist admissions demonstrated superior prediction of postlisting mortality (C-statistic 0.76) compared to estimated posttransplant survival (C-statistic 0.69).

Conclusions:

• Waitlist hospitalization is a significant predictor of adverse outcomes and resource use in kidney transplant candidates.
• While kidney transplantation benefits heavily admitted patients, allograft utility is diminished.
• Incorporating hospitalization data into kidney allocation policy could enhance patient selection and optimize resource allocation.