Table A2.
Characteristics of Patients With Stage III Colon Cancer by Travel Distance
| Characteristic | No. of Patients (%)* |
P | |||
|---|---|---|---|---|---|
| 0-12.49 Miles | 12.5-49.9 Miles | 50-249 Miles | ≥ 250 Miles | ||
| Total | 18,563 (53.5) | 12,748 (36.7) | 3,026 (8.7) | 357 (1.0) | |
| Receipt of adjuvant chemotherapy | < .001 | ||||
| No | 4,589 (24.7) | 2,919 (22.9) | 769 (25.4) | 145 (40.6) | |
| Yes | 13,974 (75.3) | 9,829 (77.1) | 2,257 (74.6) | 210 (59.4) | |
| Age at diagnosis, years | < .001 | ||||
| 18-50 | 3,125 (16.8) | 2,316 (18.2) | 512 (16.9) | 65 (18.2) | |
| 51-64 | 6,531 (35.2) | 4,735 (37.1) | 1,033 (34.1) | 142 (39.8) | |
| 65-70 | 3,255 (17.5) | 2,398 (18.8) | 612 (20.2) | 59 (16.5) | |
| 71-75 | 2,841 (15.3) | 1,739 (13.6) | 476 (15.7) | 48 (13.5) | |
| 76-80 | 2,811 (15.1) | 1,560 (12.2) | 393 (13.0) | 43 (12.0) | |
| Race/ethnicity | < .001 | ||||
| Non-Hispanic white | 11,968 (64.5) | 9,254 (72.6) | 2,330 (77.0) | 263 (73.7) | |
| Hispanic | 1,196 (6.4) | 639 (5.0) | 102 (3.4) | 17 (4.8) | |
| Black | 3,377 (18.2) | 1,383 (10.9) | 264 (8.7) | 29 (8.1) | |
| Other | 917 (4.9) | 417 (3.3) | 72 (2.4) | 18 (5.0) | |
| Unknown | 1,105 (6.0) | 1,055 (8.3) | 258 (8.5) | 30 (8.4) | |
| Sex | < .001 | ||||
| Male | 9,134 (49.2) | 6,572 (51.6) | 1,593 (52.6) | 189 (52.9) | |
| Female | 9,429 (50.8) | 6,176 (48.5) | 1,433 (47.4) | 168 (47.1) | |
| Insurance | < .001 | ||||
| Uninsured | 917 (4.9) | 636 (5.0) | 143 (4.7) | 13 (3.6) | |
| Medicaid | 1,216 (6.6) | 590 (4.6) | 150 (5.0) | 7 (2.0) | |
| Medicare (age 18-64 years) | 826 (4.5) | 574 (4.5) | 157 (5.2) | 9 (2.5) | |
| Medicare with supplement | 4,257 (22.9) | 2,958 (23.2) | 845 (27.9) | 80 (22.4) | |
| Medicare without supplement | 1,459 (7.9) | 893 (7.0) | 249 (8.2) | 26 (7.3) | |
| Medicare Advantage | 944 (5.1) | 532 (4.2) | 118 (3.9) | 6 (1.7) | |
| Medicare/Medicaid | 560 (3.0) | 326 (2.6) | 90 (3.0) | 3 (0.8) | |
| Private | 8,122 (43.8) | 6,053 (47.5) | 1,226 (40.5) | 177 (49.6) | |
| Missing | 262 (1.4) | 186 (1.5) | 48 (1.6) | 36 (10.1) | |
| Diagnosis year | .300 | ||||
| 2007 | 4,797 (25.8) | 3,210 (25.2) | 749 (24.8) | 70 (19.6) | |
| 2008 | 4,764 (25.7) | 3,270 (25.7) | 781 (25.8) | 96 (26.9) | |
| 2009 | 4,513 (24.3) | 3,146 (24.7) | 736 (24.3) | 91 (25.5) | |
| 2010 | 4,489 (24.2) | 3,122 (24.5) | 760 (25.1) | 100 (28.0) | |
| Median income level | < .001 | ||||
| < $30,000 | 2,673 (14.4) | 1,449 (11.4) | 1,006 (33.3) | 50 (14.0) | |
| $30,000-$34,999 | 3,037 (16.4) | 2,391 (18.8) | 1,053 (34.8) | 91 (25.5) | |
| $35,000-$45,999 | 5,378 (29.0) | 3,629 (28.5) | 597 (19.7) | 106 (29.7) | |
| ≥ $46,000 | 7,216 (38.9) | 5,105 (40.1) | 330 (10.9) | 99 (27.7) | |
| Missing | 259 (1.4) | 174 (1.4) | 40 (1.3) | 11 (3.1) | |
| Facility type | < .001 | ||||
| Community cancer program | 3,132 (16.9) | 1,806 (14.2) | 212 (7.0) | 34 (9.5) | |
| Comprehensive community cancer program | 9,007 (48.5) | 6,526 (51.2) | 1,635 (54.0) | 128 (35.9) | |
| Teaching/research center | 3,690 (19.9) | 2,337 (18.3) | 596 (19.7) | 53 (14.9) | |
| NCI program/network | 664 (3.6) | 826 (6.5) | 412 (13.6) | 121 (33.9) | |
| Other | 2,070 (11.2) | 1,253 (9.8) | 171 (5.7) | 21 (5.9) | |
| Charlson-Deyo comorbidity score | < .001 | ||||
| 0 | 12,854 (69.3) | 9,024 (70.8) | 2,129 (70.4) | 281 (78.7) | |
| 1 | 3,941 (21.2) | 2,654 (20.8) | 633 (20.9) | 57 (16.0) | |
| ≥ 2 | 1,768 (9.5) | 1,070 (8.4) | 264 (8.7) | 19 (5.3) | |
| Density level of MO | < .001 | ||||
| Low | 16,880 (90.9) | 12,101 (94.9) | 2,904 (96.0) | 330 (92.4) | |
| High | 1,683 (9.1) | 647 (5.1) | 122 (4.0) | 27 (7.6) | |
| No. of positive lymph nodes | .330 | ||||
| < 4 | 11,786 (63.5) | 8,026 (63.0) | 1,892 (62.5) | 209 (58.5) | |
| ≥ 4 | 6,708 (36.1) | 4,663 (36.6) | 1,124 (37.1) | 146 (40.9) | |
| Unknown | 69 (0.4) | 59 (0.5) | 10 (0.3) | 2 (0.6) | |
| Tumor grade | < .001 | ||||
| Well differentiated | 1,171 (6.3) | 783 (6.1) | 169 (5.6) | 12 (3.4) | |
| Moderately differentiated | 12,268 (66.1) | 8,536 (67.0) | 1,991 (65.8) | 201 (56.3) | |
| Poorly differentiated | 4,296 (23.1) | 2,807 (22.0) | 707 (23.4) | 123 (34.5) | |
| Undifferentiated | 407 (2.2) | 307 (2.4) | 79 (2.6) | 11 (3.1) | |
| Unknown | 421 (2.3) | 315 (2.5) | 80 (2.6) | 10 (2.8) | |
| Surgical margin | < .001 | ||||
| Negative | 16,879 (90.9) | 11,556 (90.7) | 2,763 (91.3) | 304 (85.2) | |
| Positive | 1,498 (8.1) | 996 (7.8) | 195 (6.4) | 19 (5.3) | |
| Unknown | 186 (1.0) | 196 (1.5) | 68 (2.3) | 34 (9.5) | |
Abbreviations: MO, medical oncologist; NCI, National Cancer Institute.
*
Because of rounding, percentages presented throughout this table may not add up to precisely 100%.