Table 1 Baseline characteristics of patients
Characteristics | Adenoma | Stage I | Stage II | Stage III | Stage IV |
|---|---|---|---|---|---|
Sex (%) | |||||
 Male | 53 | 48 | 53 | 54 | 57 |
 Female | 47 | 52 | 48 | 46 | 43 |
Age (years) | |||||
 Median | 68 | 68 | 69 | 66 | 62 |
 Range | 33–80 | 35–87 | 40–84 | 23–84 | 19–85 |
Tumor stage | |||||
 T status (%) | |||||
  T1 or 2 | 0 | 100 | 0 | 19 | 4 |
  T3 | 0 | 0 | 100 | 75 | 83 |
  T4 | 0 | 0 | 0 | 4 | 13 |
 Nodal status (%) | 0 |  |  |  |  |
  N0 | 0 | 0 | 0 | 0 | 30 |
  N1 | 0 | 0 | 0 | 56 | 31 |
  N2 | 0 | 0 | 0 | 44 | 39 |
  Metastasis (%) | 0 | 0 | 0 | 0 | 100 |
Type of cancer (%) | |||||
 Colon | 62 | 68 | 88 | 81 | 85 |
 Rectal | 38 | 32 | 12 | 19 | 15 |