Table 1.
Descriptive statistics for all variables of interest in patients with stage III CC.
| Variable label | Level | N (%) = 41 707 |
|---|---|---|
| Facility type | Community cancer program | 5458 (13.1) |
| Comprehensive community cancer program | 20 541 (49.3) | |
| Academic/research program | 9593 (23.0) | |
| Integrated network cancer program | 6115 (14.7) | |
| Facility location | Northeast | 9606 (23.0) |
| South | 13 894 (33.3) | |
| Midwest | 11 815 (28.3) | |
| West | 6392 (15.3) | |
| Age at diagnosis | Mean | 79.42 |
| Median | 79.00 | |
| Minimum | 70.00 | |
| Maximum | 90.00 | |
| SD | 6.04 | |
| Missing | 0.00 | |
| Sex | Male | 17 544 (42.1) |
| Female | 24 163 (57.9) | |
| Median income quartiles 2000 | <$30 000 | 5347 (13.2) |
| $30 000-$34 999 | 7316 (18.0) | |
| $35 000-$45 999 | 11 675 (28.7) | |
| ≥$46 000 | 16 305 (40.1) | |
| Missing | 1064 | |
| Primary site | C180-cecum | 12 307 (29.5) |
| C182-ascending colon | 10 545 (25.3) | |
| C183-hepatic flexure of colon | 2156 (5.2) | |
| C184-transverse colon | 4264 (10.2) | |
| C185-splenic flexure of the colon | 1317 (3.2) | |
| C186-descending colon | 2124 (5.1) | |
| C187-sigmoid colon | 8242 (19.8) | |
| C188-overlapping lesion of colon | 752 (1.8) | |
| Grade | Well differentiated, differentiated, NOS | 2500 (6.0) |
| Moderately differentiated, moderately well-differentiated, and intermediate differentiation | 25 508 (61.2) | |
| Poorly differentiated | 11 924 (28.6) | |
| Undifferentiated, anaplastic | 1775 (4.3) | |
| Risk | Low risk | 21 485 (51.5) |
| High risk | 20 222 (48.5) | |
| Race | White | 36 219 (87.4) |
| Black | 3687 (8.9) | |
| Other | 1532 (3.7) | |
| Missing | 269 | |
| Hispanic ethnicity | No | 37 705 (95.8) |
| Yes | 1663 (4.2) | |
| Missing | 2339 | |
| Insurance type | Not insured | 215 (0.5) |
| Private insurance | 3989 (9.7) | |
| Government insurance | 36 963 (89.8) | |
| Missing | 540 | |
| Year of diagnosis | 2004-2006 | 8507 (20.4) |
| 2007-2009 | 7216 (17.3) | |
| 2010-2012 | 12 614 (30.2) | |
| 2013-2015 | 13 370 (32.1) | |
| Surgical margins | Negative | 37 574 (90.9) |
| Positive | 3764 (9.1) | |
| Missing | 369 | |
| Charlson-Deyo scores | 0 | 25 728 (61.7) |
| 1 | 10 774 (25.8) | |
| ≥2 | 5205 (12.5) | |
| Tumor size | ≤2 cm | 1660 (4.1) |
| 2-4 cm | 14 007 (34.3) | |
| >4 cm | 25 201 (61.7) | |
| Missing | 839 | |
| Chemotherapy type | No chemotherapy | 21 450 (51.4) |
| Single-agent chemotherapy (SAC) | 7334 (17.6) | |
| Multi-agent chemotherapy (MAC) | 12 923 (31.0) |