Table 1. Characteristics of the Study Population of 301 327 Patients.
| Characteristic | No. (%)a |
|---|---|
| Age, mean (SD), y | 75.1 (7.3) |
| Cancer type | |
| Breast | 78 736 (26.1) |
| Colorectal | 51 385 (17.0) |
| Lung | 95 635 (31.9) |
| Prostate | 75 571 (25.0) |
| Sex | |
| Male | 149 485 (49.6) |
| Female | 151 842 (50.4) |
| Race/ethnicity | |
| White | 241 232 (80.0) |
| Black | 26 650 (8.8) |
| Hispanic | 15 991 (5.3) |
| Asian/Pacific Islander | 13 537 (4.5) |
| Otherb | 3917 (1.3) |
| Marital status | |
| Married | 155 337 (52.0) |
| Single/divorced/separated/widowed | 122 485 (40.6) |
| Unknown | 23 505 (7.8) |
| Year of diagnosis | |
| 2011 | 64 185 (21.3) |
| 2012 | 61 478 (20.4) |
| 2013 | 59 317 (19.7) |
| 2014 | 57 960 (19.2) |
| 2015 | 58 387 (19.4) |
| Charlson Comorbidity Index | |
| 0 | 116 382 (38.6) |
| 1 | 73 049 (24.4) |
| 2 | 43 857 (14.2) |
| ≥3 | 68 039 (22.6) |
| SEER registry sites | |
| San Francisco-Oakland/San Jose-Monterey | 17 804 (5.9) |
| Connecticut | 16 249 (5.4) |
| Detroit | 18 429 (6.1) |
| Hawaii | 3181 (1.0) |
| Iowa | 17 778 (5.9) |
| New Mexico | 5877 (2.0) |
| Seattle-Puget Sound | 18 135 (6.0) |
| Utah | 5710 (1.9 |
| Los Angeles | 17 340 (5.8) |
| Greater California | 55 755 (18.5) |
| Kentucky | 23 668 (7.9) |
| Louisiana | 19 974 (6.7) |
| New Jersey | 45 134 (15.0) |
| Georgia | 36 293 (12.0) |
| Cancer-directed surgery within 6 mo | |
| No | 165 129 (54.8) |
| Yes | 136 198 (45.2) |
| Chemotherapy within 6 mo | |
| No | 180 885 (60.0) |
| Yes | 120 442 (40.0) |
| Radiation within 6 mo | |
| No | 222 558 (73.8) |
| Yes | 78 769 (26.2) |
a
Percentages may not total 100 because of rounding.
b
Other racial/ethnic groups include 1119 American Indian/Alaska Native patients and 2798 patients with unknown race/ethnicity.