SRTR: Organ Yield Models Updated
SRTR has updated the organ procurement organization (OPO) yield models and plans to integrate the models into the January 2018 OPO-specific reports (OSRs). These models are used to derive expected organ yield for deceased donors as reported in the OSRs.
As part of the process for updating the models, SRTR sought feedback on potentially important predictors and interactions among predictors; the responses directly contributed to incorporation of new predictors, for example, warm ischemia time for donation after circulatory death donors and ejection fraction. The models are now estimated with the Least Absolute Shrinkage and Selection Operator (LASSO). The LASSO can select important covariates while improving the prediction of organ yield. Additionally, in response to the HIV Organ Policy Equity Act, the updated models now adjust for donor HIV status.