Table 2 Classification scheme for yearly surveillance assessments
Year 1 categorization | Â | Year 1 CEAa | Year 1 CT | Year 1 colonoscopy |
|---|---|---|---|---|
 More Adherent |  | ≥ 2 | ≥ 1 | ≥ 1 |
|  | ≥ 2 | ≥ 1 | 0 | |
|  | ≥ 2 | 0 | ≥ 1 | |
|  | 1 | ≥ 1 | 0 | |
|  | 1 | 0 | ≥ 1 | |
 Less Adherent |  | ≥ 2 | 0 | 0 |
| Â | 1 | 0 | 0 | |
|  | 0 | ≥ 1 | 0 | |
|  | 0 | 0 | ≥ 1 | |
 Nonadherent |  | 0 | 0 | 0 |
Year 2 categorization | Year 1 colonoscopy | Year 2 CEA | Year 2 CT | Year 2 colonoscopy |
 More Adherent |  | ≥ 2 | ≥ 1 |  |
|  | ≥ 2 | 0 | ≥ 1 | |
≥ 1 | ≥ 2 | 0 | 0 | |
≥ 1 | 1 | 0 | 0 | |
|  | 1 | ≥ 1 |  | |
|  | 1 | 0 | ≥ 1 | |
 Less Adherent | 0 | ≥ 2 | 0 | 0 |
0 | 1 | 0 | 0 | |
|  | 0 | ≥ 1 |  | |
|  | 0 | 0 | ≥ 1 | |
 Nonadherent |  | 0 | 0 | 0 |
Year 3 categorization | Year 2 colonoscopy | Year 3 CEA | Year 3 CT | Year 3 colonoscopy |
 More Adherent |  | ≥ 2 | ≥ 1 |  |
|  | ≥ 2 | 0 |  | |
|  | 1 | ≥ 1 |  | |
|  | 1 | 0 | ≥ 1 | |
≥ 1 | 1 | 0 | 0 | |
 Less Adherent | 0 | 1 | 0 | 0 |
|  | 0 | ≥ 1 |  | |
|  | 0 | 0 | ≥ 1 | |
 Nonadherent |  | 0 | 0 | 0 |