Table 2.
Frequency table for criteria in the first decision step of the model created from patient data and their levels.
| Criteria | Frequency | Percent |
|---|---|---|
| Stage of disease | ||
| T1N0M0 | 11 | 2.8 |
| T1N2M0 | 1 | 0.3 |
| T2N0M0 | 28 | 7.2 |
| T2N0M1 | 2 | 0.5 |
| T2N1M0 | 11 | 2.8 |
| T2N2M0 | 3 | 0.8 |
| T3N0M0 | 58 | 14.9 |
| T3N0M1 | 7 | 1.8 |
| T3N1M0 | 68 | 17.5 |
| T3N1M1 | 11 | 2.8 |
| T3N2M0 | 52 | 13.4 |
| T3N2M1 | 8 | 2.1 |
| T3N3M1 | 1 | 0.3 |
| T4N0M0 | 28 | 7.2 |
| T4N0M1 | 1 | 0.3 |
| T4N1M0 | 39 | 10.1 |
| T4N1M1 | 2 | 0.5 |
| T4N2M0 | 42 | 10.8 |
| T4N2M1 | 13 | 3.4 |
| T4N3M0 | 1 | 0.3 |
| T4N3M1 | 1 | 0.3 |
| Location of the tumor | ||
| Lower | 153 | 39.4 |
| Middle | 153 | 39.4 |
| Upper | 82 | 21.1 |
| Coexisting disease or pathology | ||
| Present | 121 | 31.2 |
| • DMa | 17 | 4.4 |
| • DM+HTb | 13 | 3.4 |
| • DM+CADc | 4 | 1.0 |
| • DM+CAD+HT+Other | 1 | 0.3 |
| • DM+COPDd | 1 | 0.3 |
| • DM+COPD+HT | 1 | 0.3 |
| • HT | 44 | 11.3 |
| • HT+Other | 2 | 0.5 |
| • HT+CKFe | 2 | 0.5 |
| • CAD | 9 | 2.3 |
| • CAD +HT | 3 | 0.8 |
| • CKF | 4 | 1.0 |
| • COPD | 12 | 3.1 |
| •COPD+HT | 2 | 0.5 |
| •COPD+CAD | 1 | 0.3 |
| • CLFf | 1 | 0.3 |
| • Other | 4 | 1.0 |
| Absent | 267 | 68.8 |
| Invasion of adjacent organs | ||
| Present | 46 | 11.9 |
| Absent | 342 | 88.1 |
| Surgeon’s experience | ||
| Lower than 20 | 43 | 11,1 |
| Equal or upper than 20 | 345 | 88,9 |
| Presence of perforation | ||
| Present | 0 | 0 |
| Absent | 388 | 100.0 |
| Presence of obstruction | ||
| Present | 0 | 0 |
| Absent | 388 | 100.0 |
| Presence of fistula | ||
| Present | 0 | 0 |
| Absent | 388 | 100.0 |
aDM: Diabetes mellitus;
bHT: Hypertension;
cCAD: Coronary artery disease;
dCOPD: Chronic obstructive pulmonary disease;
eCKF: Chronic kidney failure;
fCLF: Chronic liver failure