Abstract
The current pediatric end-stage liver disease (PELD) score underestimates pediatric waitlist mortality. Children frequently require PELD exception points to achieve appropriate priority ranking. We developed a new PELD score using serum sodium, creatinine, and updated original PELD components to more accurately rank children and equalize children's mortality risk with the age-standardized mortality rate of adults. We included children aged younger than 12years with chronic liver disease, listed for deceased donor livers January 1, 2005-December 31, 2017. Pediatric candidates (n=5111) were followed from listing to the earliest of waitlist mortality (death or removal from the list due to being too sick to undergo transplant, n=339) or 180days. We incorporated linear splines for the current components of PELD and added sodium and creatinine to the equation. The updated PELD-Na-Cr had a cross-validated AUC ROC of 0.854, vs 0.799 for the original PELD. PELD-Na-Cr required 9.44 additional points to equalize children's mortality risk with the age-standardized mortality rate of adults. PELD-Na-Cr better ordered the sickest children and should better prioritize children relative to adults. As a result, PELD-Na-Cr could increase pediatric transplant rates and reduce pediatric liver transplant waitlist mortality.
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