Table 3.
Cross-validated C-indices: Training Cohort (NYP-WCM).
| Model 1 | Model 2 | Model 3 | |
|---|---|---|---|
| 12 hrs | |||
| RSF | 0.698 | 0.933 | 0.943 |
| CART | 0.725 | 0.813 | 0.850 |
| Cox-Elastic Net | 0.724 | 0.839 | 0.894 |
| 24 hrs | |||
| RSF | 0.690 | 0.920 | 0.927 |
| CART | 0.688 | 0.689 | 0.831 |
| Cox-Elastic Net | 0.687 | 0.792 | 0.868 |
| 48 hrs | |||
| RSF | 0.648 | 0.852 | 0.891 |
| CART | 0.661 | 0.565 | 0.821 |
| Cox-Elastic Net | 0.660 | 0.708 | 0.845 |
‘hrs’=hours since index time where index time contingent on model scenario.
‘CART’=Classification and Regression Tree for survival.
‘Cox-Elastic Net’=Cox proportional hazards regression with predictors chosen through elastic net regression.
‘Model 1’=predictors at ED presentation alone; index time defined at 24 h of hospitalization.
‘Model 2’=predictors at ED presentation including longitudinal laboratory and vital sign features extracted up to 24 h; index time defined at 24 h of hospitalization.
‘Model 3’=predictors at ED presentation including longitudinal laboratory and vital sign features extracted up to random index time; index time defined at random time as discussed in text.