Table 2:
Ten variables with the highest importance on maintenance steroid use.
| Rank | Variable | Importance | Relative value |
|---|---|---|---|
| 1 | Induction agent | 0.452 | Reference |
| 2 | Calculated PRA | 0.175 | 39% |
| 3 | Functional status (Karnofsky Performance Scale) | 0.149 | 33% |
| 4 | Recipient race | 0.132 | 29% |
| 5 | Cold ischemic time | 0.102 | 23% |
| 6 | Recipient hypertension | 0.073 | 16% |
| 7 | Recipient HBV core antibody | 0.072 | 16% |
| 8 | Retransplant | 0.071 | 16% |
| 9 | Machine perfusion | 0.071 | 16% |
| 10 | Recipient total serum albumin | 0.063 | 14% |
Importance estimates are the mean of the absolute value of the Shapley additive explanation values from an extreme gradient boosting model to characterize the choice of early steroid withdrawal versus conventional steroid maintenance. Relative values are scaled to the highest-ranked variable.
HBV, hepatitis B virus.