Table 1. Characteristics of all CC patients in the SEER database: 2004-2013.
| Characteristics | No. of Patients | Percent |
|---|---|---|
| Gender | ||
| Female | 56972 | 51.8% |
| Male | 52930 | 48.2% |
| Age | ||
| 20-39 | 2425 | 2.2% |
| 40-59 | 26008 | 23.7% |
| 60-79 | 55087 | 50.1% |
| ≥80 | 26382 | 24.0% |
| Calendar year | ||
| 2004-2008 | 56167 | 51.1% |
| 2009-2013 | 53735 | 48.9% |
| Stage | ||
| Stage I | 25606 | 23.3% |
| Stage II | 42967 | 39.1% |
| Stage III | 41329 | 37.6% |
| T stage | ||
| T1 | 11524 | 10.5% |
| T2 | 19073 | 17.4% |
| T3 | 66929 | 60.9% |
| T4 | 12376 | 11.2% |
| Tumor size (cm) | ||
| 0-2 | 14797 | 13.5% |
| 2-5 | 59363 | 54.0% |
| ≥5 | 35742 | 32.5% |
| Grade | ||
| Grade I | 9789 | 8.9% |
| Grade II | 78739 | 71.7% |
| Grade III | 19018 | 17.3% |
| Grade IV | 2356 | 2.1% |
| Histology | ||
| Adenocarcinoma | 97484 | 88.7% |
| Mucous cancer | 11725 | 10.7% |
| Others | 693 | 0.6% |
| Location | ||
| Right colon | 68638 | 62.5% |
| Left colon | 41264 | 37.5% |
| Treatment | ||
| Segmental resection | 41217 | 37.5% |
| Hemicolectomy | 65979 | 60.0% |
| Others | 2706 | 2.5% |
| Lymph nodes examined | ||
| <12 lymph nodes | 26068 | 23.7% |
| ≥12 lymph nodes | 83834 | 76.3% |