Table 1.
Top important features for survived patients after early surgery (<4 weeks) compared with survived patients after delayed surgery (≥4 weeks).
| LR | SVM | RF | |||
|---|---|---|---|---|---|
| Significant variable |  |
Confirmed variable | meanImp | Variable | MeanDecreaseGini |
| Pulmonary failure | 21.89 | Onset of fever | 21.40 | Onset of fever | 14.25 |
| POF | 19.77 | Infected necrosis | 13.37 | Age | 9.18 |
| Renal failure | 5.11 | IL-6 | 10.82 | Infected necrosis | 5.10 |
| IL-6 | 2.71 | Modified Marshall score pre-operation | 9.58 | Modified Marshall score on admission | 4.35 |
| PCT | 1.36 | Modified Marshall score on admission | 7.99 | CRP | 3.54 |
| Duration of organ failure | 1.20 | Sputum | 7.63 | IL-6 | 3.40 |
| Infected necrosis | 1.11 | CRRT | 6.79 | Modified Marshall score pre-operation | 3.31 |
| WBC | 0.78 | CRP | 6.12 | Duration of organ failure | 2.66 |
| Onset of fever | 0.68 | Onset of renal failure | 5.49 | WBC | 1.63 |
| CRP | 0.31 | Renal failure | 5.42 | Sputum | 1.62 |
LR, logistic regression; SVM, support vector machine; RF, random forest; POF, persistent organ failure; IL-6, interleukin 6; PCT, procalcitonin; WBC, white blood cell; CRP, C-reactive protein; CRRT, continuous renal replacement therapy.