PELD = [0.480×LN(Bilirubin) + 1.857×LN(INR) - 0.687×LN(Albumin) + 0.436×Age Score + 0.667×Growth Failure Score]×10

The Pediatric End-Stage Liver Disease (PELD) score is a severity of illness score for children under 18 years old, based on the severity of liver disease rather than the duration of illness, to optimize organ allocation for liver transplantation.

A higher PELD score indicates a worse prognosis. Since 2002, the PELD scoring system has been used by the United Network for Organ Sharing (UNOS) in the United States to assess the condition of children before transplantation, predicting mortality risk while waiting for a transplant. Higher scores prioritize children for receiving a deceased donor organ.

Note: Age < 1 year is scored as 1 point (for children listed for liver transplantation before their first birthday, this score can be used until they are 24 months old), Age ≥ 1 year is scored as 0 points; Growth Failure: below 2 standard deviations from the mean is scored as 1 point, otherwise 0 points.