Table 1. Characteristics of the Study Population.
| Characteristic | Patients, No. (%) | |
|---|---|---|
| NSCLC | Colorectal cancer | |
| Age, y | ||
| 65-69 | 31 521 (29.7) | 14 045 (35.5) |
| 70-74 | 29 350 (27.6) | 9154 (23.2) |
| 75-79 | 24 224 (22.8) | 7296 (18.5) |
| 80-84 | 14 118 (13.3) | 5125 (13.0) |
| ≥85 | 7015 (6.6) | 3892 (9.9) |
| Sex | ||
| Female | 50 348 (47.4) | 17 518 (44.3) |
| Male | 55 880 (52.6) | 21 994 (55.7) |
| Race and ethnicity | ||
| Asian | 2269 (2.1) | 896 (2.3) |
| Black (non-Hispanic) | 8282 (7.8) | 3521 (8.9) |
| Hispanic | 992 (0.9) | 617 (1.6) |
| White (non-Hispanic) | 91 215 (85.9) | 32 753 (82.9) |
| Othera | 3470 (3.3) | 1725 (4.4) |
| Urban residence | ||
| Urban | 83 584 (78.7) | 30 662 (77.6) |
| Large rural | 11 783 (11.1) | 4405 (11.1) |
| Small rural | 6249 (5.9) | 2569 (6.5) |
| Isolated | 4612 (4.3) | 1876 (4.7) |
| Median incomeb | ||
| ≥$80 000 | 16 460 (15.5) | 6183 (15.6) |
| $60 000 to <$80 000 | 22 519 (21.2) | 8163 (20.7) |
| $40 000 to <$60 000 | 44 851 (42.2) | 16 488 (41.7) |
| <$40 000 | 20 696 (19.5) | 7916 (20.0) |
| Unknown | 1702 (1.6) | 762 (1.9) |
| High school graduation rateb | ||
| ≥93% | 29 461 (27.7) | 10 762 (27.2) |
| 89%-92% | 25 769 (24.3) | 9156 (23.2) |
| 83%-88% | 26 268 (24.7) | 9671 (24.5) |
| 0%-82% | 23 295 (21.9) | 9261 (23.4) |
| Unknown | 1435 (1.4) | 662 (1.7) |
| Dual eligible | ||
| Yes | 16 892 (15.9) | 7141 (18.1) |
| No | 89 336 (84.1) | 32 371 (81.9) |
| Charlson score | ||
| 0 | 39 960 (37.6) | 22 227 (56.3) |
| 1 | 28 665 (27.0) | 7808 (19.8) |
| 2 | 16 434 (15.5) | 4411 (11.2) |
| ≥3 | 21 169 (19.9) | 5066 (12.8) |
| Practice type | ||
| NCI-designated cancer center | 13 485 (12.7) | 4950 (12.5) |
| Other academic center | 6021 (5.7) | 2166 (5.5) |
| Other hospital-owned practice | 18 277 (17.2) | 6512 (16.5) |
| Large independent practice | 53 709 (50.6) | 19 798 (50.1) |
| Small independent practice | 14 736 (13.9) | 6086 (15.4) |
| Primary tumor site | ||
| Left sided | NA | 5684 (14.4) |
| Right sided | NA | 8377 (21.2) |
| Rectal | NA | 18 715 (47.4) |
| Unknown | NA | 6736 (17.0) |
Abbreviations: NA, not applicable; NCI, National Cancer Institute; NSCLC, non–small cell lung cancer.
a
Includes Pacific Islander, American Indian or Alaska Native, other, and unknown.
b
Calculated at the zip code level.