End-stage liver disease severity and transplant priority

What it is and when to use it

MELD 3.0 is an update of the MELD index that estimates 90-day mortality in patients with advanced chronic liver disease and sets priority for liver transplantation. It combines bilirubin, INR, creatinine, sodium and albumin, and adds sex and variable interactions to correct the underestimation of disease severity in women. In the United States, the OPTN (operated by UNOS) implemented it in 2023 as the official organ allocation criterion for candidates aged 12 and older.

How to interpret it

The score ranges from 6 to 40; the higher the value, the greater the estimated 90-day mortality and the higher the transplant priority. Values near 6 indicate compensated disease with low risk, whereas scores ≥30 reflect high mortality and urgent need for transplantation. On allocation lists, a higher score confers priority over candidates with a lower score. The value is rounded to the nearest integer and capped at 40.

Limitations and when not to use it

Validated in candidates aged 12 and older with chronic liver disease; PELD is used for children under 12. It does not predict mortality in acute fulminant hepatitis or in specific scenarios requiring MELD exceptions (e.g., hepatocellular carcinoma, hepatopulmonary syndrome). The calculation becomes less reliable with anticoagulation that alters INR or with extreme nutritional deficits; in patients on dialysis (≥2 sessions or 24 h of continuous therapy in the prior 7 days) creatinine is automatically set to 3.0 mg/dL, and creatinine is capped at 3.0 mg/dL in all cases. It does not assess complications such as refractory ascites, encephalopathy, or quality of life, a frequent cause of clinical underestimation.

Frequently asked questions

What is the difference between MELD-Na and MELD 3.0?

MELD 3.0 adds albumin and sex and incorporates interactions between variables, which improves mortality prediction and corrects the historical disadvantage of women compared with MELD-Na.

What is the minimum MELD 3.0 to be listed for transplantation?

There is no single universal threshold, but referral for evaluation is often considered from a score of about 15, where the benefit of transplantation outweighs the surgical risk; recent MELD 3.0 data place that survival benefit as low as a score of about 12.

Does sex affect the MELD 3.0 score?

Yes; the model adds points for female sex (approximately 1.33) to offset the fact that creatinine tends to underestimate renal dysfunction in women, reducing inequity in access to transplantation.