Table 5.
Top important features for mortality after delayed surgery (≥4 weeks).
| LR | SVM | RF | |||
|---|---|---|---|---|---|
| Significant variable |  |
Confirmed variable | meanImp | Variable | MeanDecreaseGini |
| Circulatory failure | 60.16 | Time of surgery | 12.13 | Time of surgery | 167.62 |
| Modified Marshall score pre-operation | 14.17 | Duration of organ failure | 9.52 | Duration of organ failure | 122.11 |
| Modified Marshall score pre-operation | 8.64 | Onset of renal failure | 111.15 | ||
| Onset of renal failure | 8.60 | Onset of fever | 108.94 | ||
| Male | 8.35 | Modified Marshall score pre-operation | 66.56 | ||
| Onset of multiple organ failure | 7.34 | Onset of multiple organ failure | 52.52 | ||
| Onset of fever | 7.30 | Onset of single organ failure | 45.50 | ||
| Modified Marshall score on admission | 7.19 | Onset of POF | 45.18 | ||
| Number of organ failure systems | 7.17 | Male | 43.82 | ||
| Blood culture | 6.99 | POF pre-operation | 32.31 | ||
LR, logistic regression; SVM, support vector machine; RF, random forest; POF, persistent organ failure.