TABLE 1.
Patient and Treatment Characteristics (N = 5086)
| Characteristic | No. (% or Range) |
|---|---|
| Demographics | |
| Sex | |
| Male | 3100 (61) |
| Female | 1986 (39) |
| Age | |
| Median | 59 (19-90) |
| <60 | 1743 (53.1) |
| ≥60 | 1537 (46.9) |
| Race | |
| White | 4369 (85.9) |
| African American | 412 (8.1) |
| Other/unknown | 305 (6.0) |
| Comorbidity score | |
| 0 | 4029 (59.8) |
| 1 | 829 (16.3) |
| 2+ | 228 (4.5) |
| Insurance | |
| Not insured | 226 (4.4) |
| Private | 2849 (56.0) |
| Government | 1953 (38.4) |
| Treatment facility type | |
| Community cancer program | 295 (5.8) |
| Academic/research program | 1917 (37.7) |
| Comprehensive cancer program/other | 2874 (56.5) |
| Treatment facility location | |
| Metro counties | 4098 (82.3) |
| Urban counties | 794 (15.9) |
| Rural counties | 88 (1.8) |
| Income, US dollars | |
| <48,000 | 2012 (39.7) |
| ≥48,000 | 3059 (60.3) |
| Distance to treatment facility, miles | |
| ≤10 | 2391 (47.0) |
| >10 | 2679 (52.7) |
| Location | |
| East | 1944 (38.2) |
| Central | 1913 (37.6) |
| West | 870 (17.1) |
| Year of diagnosis | |
| 2010–2011 | 1105 (21.7) |
| 2012–2013 | 1702 (33.5) |
| 2014–2015 | 2279 (44.8) |
| Disease characteristics | |
| Clinical T stage | |
| T1/T2 | 317 (6.2) |
| T3 | 4312 (84.8) |
| T4 | 428 (8.4) |
| Clinical T size | |
| <2 cm | 724 (14.2) |
| 2–5 cm | 2517 (49.5) |
| >5 cm | 1237 (24.3) |
| Clinical N stage | |
| N0 | 2026 (39.8) |
| N1 | 2408 (47.3) |
| N2 | 607 (11.9) |
| Grade | |
| Well differentiated | 403 (7.9) |
| Moderately differentiated | 3533 (69.5) |
| Poorly differentiated | 537 (10.6) |
| Microsatellite instability | |
| Negative (stable) | 4450 (87.5) |
| Positive (instable) | 636 (12.5) |
| Treatment characteristics | |
| Radiation dose, Gy | |
| Median (Gy) | 50.4 (40.4–70.2) |
| <50.4 | 769 (15.1) |
| ≥50.4 and <54 | 3754 (73.8) |
| ≥54 | 563 (11.1) |
| Time from XRT to surgery | |
| ≤2 mos | 2679 (52.7) |
| 2–4mos | 2407 (47.3) |
| Preoperative chemotherapy | |
| Single agent | 2850 (56.0) |
| Double agent | 2088 (41.1) |
| Unknown | 148 (2.9) |
Note: If sum of percentages is <100, then the remaining data are missing/unreported. Gy, gray.