Table 2. Summary of adjusted conditional survival rates for rectal adenocarcinoma patients at year 0 and year 5 (N = 22,610).
| No XRT (N = 8,939) | Preoperative XRT (N = 2,818) | Postoperative XRT (N = 5,954) | Stage IV (N = 4,899) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||||
| Year 0 (%) | Year 5 (%) | Δ | Year 0 (%) | Year 5 (%) | Δ | Year 0 (%) | Year 5 (%) | Δ | Year 0 (%) | Year 5 (%) | Δ | |
| Age (years) | ||||||||||||
| <50 | 87.5 | 93.3 | 5.8 | 82.0 | 92.3 | 10.2 | 76.3 | 87.8 | 11.5 | 7.5 | 55.9 | 48.4 |
| 50–59 | 85.0 | 91.9 | 6.8 | 78.7 | 90.7 | 12.0 | 72.4 | 85.6 | 13.2 | 7.3 | 55.6 | 48.3 |
| 60–69 | 82.4 | 90.4 | 8.0 | 76.8 | 89.8 | 13.0 | 68.1 | 83.1 | 15.1 | 4.5 | 49.8 | 45.3 |
| 70–79 | 77.3 | 87.4 | 10.1 | 67.7 | 85.3 | 17.6 | 62.4 | 79.8 | 17.3 | 2.4 | 43.5 | 41.0 |
| 80+ | 68.6 | 82.1 | 13.5 | 64.1 | 83.5 | 19.3 | 52.2 | 73.2 | 21.0 | 1.8 | 40.6 | 38.8 |
| Gender | ||||||||||||
| Male | 78.4 | 88.1 | 9.7 | 76.4 | 89.6 | 13.2 | 67.8 | 83.0 | 15.2 | 4.2 | 49.2 | 45.0 |
| Female | 81.0 | 89.6 | 8.6 | 76.3 | 89.6 | 13.3 | 69.9 | 84.2 | 14.3 | 4.1 | 48.8 | 44.7 |
| Ethnicity | ||||||||||||
| White | 79.8 | 88.9 | 9.1 | 77.4 | 90.1 | 12.7 | 68.8 | 83.6 | 14.8 | 4.3 | 49.3 | 45.0 |
| Black | 73.9 | 85.4 | 11.5 | 64.4 | 83.6 | 19.2 | 61.5 | 79.1 | 17.7 | 2.4 | 43.3 | 40.9 |
| Other | 81.0 | 89.6 | 8.6 | 73.4 | 88.1 | 14.8 | 71.0 | 84.8 | 13.8 | 5.8 | 52.7 | 46.9 |
| Tumor Grade | ||||||||||||
| Low | 80.3 | 89.1 | 8.9 | 78.2 | 90.5 | 12.3 | 70.8 | 84.7 | 13.9 | 5.8 | 52.7 | 46.9 |
| High | 74.9 | 86.0 | 11.1 | 66.0 | 84.4 | 18.4 | 60.9 | 78.8 | 17.9 | 1.4 | 38.2 | 36.8 |
| Unknown | 74.5 | 85.8 | 11.2 | 67.8 | 85.4 | 17.6 | 52.6 | 73.4 | 20.9 | 1.0 | 35.6 | 34.6 |
| AJCC stage | ||||||||||||
| I | 88.5 | 93.8 | 5.3 | 88.8 | 95.3 | 6.5 | 83.7 | 83.7 | 8.1 | - | - | - |
| IIA | 75.6 | 86.4 | 10.8 | 80.3 | 91.5 | 11.1 | 78.8 | 78.8 | 10.4 | - | - | - |
| IIB | 62.4 | 78.2 | 15.8 | 66.9 | 84.9 | 18.0 | 62.7 | 62.7 | 17.2 | - | - | - |
| IIIA | 74.8 | 85.9 | 11.1 | 81.0 | 91.8 | 10.8 | 80.6 | 80.6 | 9.6 | - | - | - |
| IIIB | 53.4 | 72.1 | 18.7 | 60.2 | 81.3 | 21.1 | 63.9 | 63.9 | 16.7 | - | - | - |
| IIIC | 36.2 | 58.8 | 22.6 | 43.5 | 71.2 | 27.8 | 47.5 | 47.5 | 22.4 | - | - | - |
| IV | - | - | - | - | - | - | - | - | - | 4.1 | 49.0 | 44.9 |
XRT, radiation therapy; Δ, indicates the absolute survival improvement when patients have survived 5 years; AJCC, American Joint Commission on Cancer Staging Manual (6th ed.).