Table 1 The information gain (IG) of 44 variables
Variable | IG | Variable | IG | Variable | IG | Variable | IG |
|---|---|---|---|---|---|---|---|
Age | 4.427 | GCS | 0.000 | Respiratory function | 2.971 | The chronic diseases | 17.430 |
Cardiac function | 2.908 | Operation type | 1.863 | Levels of sodium | 1.373 | Smoking | 1.813 |
Respiratory function | 2.971 | Number of procedures | 2.009 | Potassium | 4.144 | Alcoholism | 1.170 |
ECG | 3.388 | Operative blood loss | 13.551 | Creatinine | 0.928 | Preoperative radiotherapy | 1.053 |
Systolic BP | 3.72 | Peritoneal contamination | 1.661 | Hematocrit | 0.980 | Preoperative chemotherapy | 1.465 |
Pulse rate | 2.981 | Malignancy | 2.477 | Preoperative WBC | 4.002 | Preoperative surgery | 2.099 |
Hemoglobin levels | 4.511 | Confidential Enquiry into Perioperative Deaths | 0.015 | Operation time | 17.060 | Primary/recurrence | 1.745 |
WBC count | 4.002 | Rectal temperature | 0.010 | Diameter of the tumor | 10.935 | Surgery classification | 16.009 |
Levels of blood urea nitrogen | 0.927 | Mean arterial pressure: | 2.103 | Amount of blood loss | 13.551 | Clinical grading | 8.2800 |
Sodium: | 3.291 | Blood pH | 2.372 | Hematocrit of POD1 | 1.983 | Pathological grading: | 4.998 |
Potassium | 5.370 | Heart rate | 2.981 | Glucose of POD1 | 9.560 | Preoperative blood urea (g/L) | 0.913 |