TABLE 4.
Poisson calibration for the full and abbreviated iBOX at 1 year posttransplant in the validation datasets.
| 1 year Posttransplant | ||||
|---|---|---|---|---|
| Dataset | Full iBOX | |||
| n | Observed graft loss events | Predicted graft loss events | p | |
| Mayo Clinic Rochester | 483 | 18 | 24.34 | .20 |
| Helsinki University Hospital | 344 | 21 | 14.40 | .08 |
| BENEFIT RCT | 416 | 12 | 14.52 | .51 |
| BENEFIT-EXT RCT | 260 | 12 | 14.97 | .44 |
| Dataset | Abbreviated iBOX | |||
| n | Observed graft loss events | Predicted graft loss events | p | |
| Mayo Clinic Rochester | 497 | 20 | 24.41 | .37 |
| Helsinki University Hospital | 344 | 21 | 16.19 | .23 |
| BENEFIT RCT | 515 | 15 | 18.77 | .39 |
| BENEFIT-EXT RCT | 357 | 23 | 22.97 | 1.00 |
RCT, randomized controlled trial.
A p-value of <.05 would indicate a significant difference between the expected number of graft loss events as predicted by the iBOX versus the actual number of graft loss events.