Table II.
Patient, tumor, and primary treatment characteristics
| Patient demographics | n = 12,381 | n = 8,080 |
|---|---|---|
| Age (y), mean ± SD | 77.1 ± 7.1 | 75.7 ± 6.5 |
| Female sex* | 6,590 (53.2) | 4,337 (53.7) |
| Race (n = 12,365) | ||
| White | 10,621 (85.9) | 6,985 (86.5) |
| Black | 998 (8.1) | 614 (7.6) |
| Hispanic | 550 (4.5) | 339 (4.2) |
| Other | 196 (1.6) | 134 (1.7) |
| Charlson comorbidity score | ||
| 0 | 7,284 (58.8) | 5,197 (64.3) |
| 1 | 2,867 (23.2) | 1,786 (22.1) |
| 2 | 1,202 (9.7) | 661 (8.2) |
| 3 | 1,028 (8.3) | 436 (5.4) |
| Tumor characteristics | ||
| Colon cancer | 10,734 (86.7) | 6,427 (79.5) |
| Rectal cancer | 1,647 (13.3) | 1,653 (20.5) |
| Local | 5,970 (48.2) | 4,422 (54.7) |
| Regional | 6,411 (51.8) | 3,658 (45.3) |
| Tumor size (N = 10,095), mean, mm | 44.3 | 42.3 |
| Lymph node status (N = 11,342/7,405) | ||
| Positive | 3,862 (34.1) | 2,050 (27.7) |
| Negative | 7,480 (66.0) | 5,355 (72.3) |
| Poorly differentiated | 2,164 (17.5) | 1,161 (14.4) |
| Site | ||
| Right | 5,339 (43.1) | 3,439 (42.6) |
| Left | 4,081 (33.0) | 2,864 (35.5) |
| Transverse | 854 (6.9) | 528 (6.5) |
| Unspecified | 460 (3.7) | 292 (3.6) |
| Treatment | ||
| Adjuvant chemotherapy (yes) | 3,760 (30.4) | 2,656 (32.9) |
| Adjuvant radiation (rectal cancer only) | 310 (21.2) | 200 (20.9) |
| Neoadjuvant chemotherapy (yes) | 665 (5.4) | 456 (5.6) |
| Neoadjuvant radiation (rectal cancer only) | 717 (29.2) | 505 (30.5) |
*
Values are n (%) unless otherwise indicated.