Table 2. Characteristics of study subjects.
| Variable | Selection phase Identification phase |
Validation phase | |
|---|---|---|---|
| Patient | 51 | 57 | |
| Gender | |||
| Male | 30 | 30 | |
| Female | 21 | 27 | |
| Age (year) | |||
| Median (range) | 61 (35-77) | 63 (32-81) | |
| Tissue type | |||
| Colon | 38 | 29 | |
| Rectum | 13 | 25 | |
| Colorectum | 0 | 3 | |
| Liver metastasis | 51 | 0 | |
| TNM stage | |||
| Tumor stage (T) | |||
| Tis | 0 | 0 | |
| T1 | 0 | 2 | |
| T2 | 3 | 18 | |
| T3 | 5 | 13 | |
| T4 | 43 | 24 | |
| Nodal status (N) | |||
| N0 | 15 | 57 | |
| N1 | 20 | 0 | |
| N2 | 16 | 0 | |
| Distant metastases (M) | |||
| M0 | 0 | 57 | |
| M1 | 51 | 0 | |
| Pathological stage | |||
| 0 | 0 | 0 | |
| I | 0 | 20 | |
| II | 0 | 37 | |
| III | 0 | 0 | |
| IV | 51 | 0 | |
| Histologic grade | |||
| I | 0 | 1 | |
| II | 29 | 42 | |
| III | 22 | 14 | |
| Liver metastases within five years | |||
| Presence | 51 | 21 | |
| Absence | 0 | 36 | |