Table 1.
Participant characteristics overall and by age group.
| Overall (N=1,590) |
YAs age 18–39 (n=81) |
Age 40–49 (n=196) |
Age 50–64 (n=627) |
Age 65+ (n=686) |
|
|---|---|---|---|---|---|
| Age at diagnosis, M (SD) | 61.50 (12.70) | 34.12 (4.40) | 45.12 (2.86) | 57.37 (4.21) | 73.19 (5.97) |
| Sex, n (%) | |||||
| Female | 685 (43.1) | 43 (53.1) | 95 (48.5) | 264 (42.1) | 283 (41.3) |
| Male | 905 (56.9) | 38 (46.9) | 101 (51.5) | 363 (57.9) | 403 (58.7) |
| Race, n (%) | |||||
| White | 1,434 (90.2) | 75 (92.6) | 172 (87.8) | 545 (86.9) | 642 (93.6) |
| Black | 95 (6.0) | 2 (2.5) | 12 (6.1) | 52 (8.3) | 29 (4.2) |
| Other | 54 (3.4) | 4 (4.9) | 11 (5.6) | 27 (4.3) | 12 (1.7) |
| Missing | 7 (0.4) | 0 (0.0) | 1 (0.5) | 3 (0.5) | 3 (0.4) |
| Ethnicity, n (%) | |||||
| Hispanic | 63 (4.0) | 5 (6.2) | 13 (6.6) | 29 (4.6) | 16 (2.3) |
| Non-Hispanic | 1,521 (95.7) | 76 (94.3) | 183 (93.4) | 594 (94.7) | 668 (97.4) |
| Missing | 6 (0.4) | 0 (0.0) | 0 (0.0) | 4 (0.6) | 2 (0.3) |
| Smoking status, n (%) | |||||
| Never smoker | 730 (45.9) | 50 (61.7) | 116 (59.2) | 278 (44.3) | 286 (41.7) |
| Former smoker | 584 (36.7) | 20 (24.7) | 46 (23.5) | 215 (34.3) | 303 (44.2) |
| Current smoker | 204 (12.8) | 8 (9.9) | 28 (14.3) | 108 (17.2) | 60 (8.7) |
| Missing | 72 (4.5) | 3 (3.7) | 6 (3.1) | 26 (4.1) | 37 (5.4) |
| BMI category, n (%) | |||||
| Underweight (<18.5) | 34 (2.1) | 4 (4.9) | 5 (2.6) | 7 (1.1) | 18 (2.6) |
| Healthy (18.5–24.9) | 422 (26.5) | 34 (42.0) | 63 (32.1) | 154 (24.6) | 171 (24.9) |
| Overweight (25.0–29.9) | 600 (37.7) | 26 (32.1) | 64 (32.7) | 251 (40.0) | 259 (37.8) |
| Obesity (≥30.0) | 493 (31.0) | 10 (12.3) | 58 (29.6) | 194 (30.9) | 231 (33.7) |
| Missing | 41 (2.6) | 7 (8.6) | 6 (3.1) | 21 (3.3) | 7 (1.0) |
| Stage at diagnosis, n (%) | |||||
| 0 | 64 (4.0) | 2 (2.5) | 3 (1.5) | 21 (3.3) | 36 (5.2) |
| I | 278 (17.5) | 11 (13.6) | 22 (11.2) | 99 (15.8) | 148 (21.6) |
| II | 387 (24.3) | 16 (19.8) | 37 (18.9) | 140 (22.3) | 192 (28.0) |
| III | 554 (34.8) | 27 (33.3) | 86 (43.9) | 228 (36.4) | 215 (31.3) |
| IV | 247 (15.5) | 20 (24.7) | 38 (19.4) | 117 (18.7) | 72 (10.5) |
| Missing | 60 (3.8) | 5 (6.2) | 10 (5.1) | 22 (3.5) | 23 (3.4) |
| Disease site, n (%) | |||||
| Colon | 876 (55.1) | 50 (61.7) | 95 (48.5) | 318 (50.7) | 415 (60.5) |
| Rectum | 689 (43.3) | 27 (33.3) | 96 (49.0) | 300 (47.8) | 264 (38.5) |
| Missing | 25 (1.6) | 4 (4.9) | 5 (2.6) | 9 (1.4) | 7 (1.0) |
| Surgery, n (%) | |||||
| Yes | 1,432 (90.1) | 72 (88.9) | 173 (88.3) | 564 (90.0) | 623 (90.8) |
| No | 100 (6.3) | 4 (4.9) | 17 (8.7) | 40 (6.4) | 39 (5.7) |
| Missing | 58 (3.6) | 5 (6.2) | 6 (3.1) | 23 (3.7) | 24 (3.5) |
| Neoadjuvant therapy, n (%) | |||||
| Yes | 973 (61.2) | 42 (51.9) | 92 (46.9) | 347 (55.3) | 492 (71.7) |
| No | 548 (34.5) | 32 (39.5) | 97 (49.5) | 254 (40.5) | 165 (24.1) |
| Missing | 69 (4.3) | 7 (8.6) | 7 (3.6) | 26 (4.1) | 29 (4.2) |
| Adjuvant therapy, n (%) | |||||
| Yes | 836 (52.6) | 25 (30.9) | 87 (44.4) | 293 (46.7) | 431 (62.8) |
| No | 613 (38.6) | 46 (56.8) | 96 (49.0) | 268 (42.7) | 203 (29.6) |
| Missing | 141 (8.9) | 10 (12.3) | 13 (6.6) | 66 (10.5) | 52 (7.6) |
Note: BMI, body mass index calculated as kg/m2; YA, young adult. Percentages may not sum to 100 due to rounding