Table 2.
Participant Characteristics (N = 13,229).
| Variable | No. (%) |
|---|---|
| Colorectal cancer | |
| Age at diagnosis, years | |
| Mean (SD) | 75.6 (6.94) |
| ≤70 | 3702 (27.98%) |
| 71–75 | 3327 (25.15%) |
| 76–80 | 2889 (21.84%) |
| >80 | 3311 (25.03%) |
| Sex | |
| Male | 6433 (48.63%) |
| Female | 6796 (51.37%) |
| Origin and race/ethnicity‡ | |
| Hispanic | 1891 (14.29%) |
| White | 10170 (76.88%) |
| Black | 897 (6.78%) |
| Other | 271 (2.05%) |
| Income§ | |
| Q1 (< $39,350 per year) | 3335 (26.61%) |
| Q2 ($39,350 - $47,398 per year) | 3109 (24.81%) |
| Q3 ($47,399 - $60,680 per year) | 2994 (23.89%) |
| Q4 (>$60,680 per year) | 3095 (24.69%) |
| Education (percent of people without high school diploma)§ | |
| Q1 (≥ 23.2%) | 3768 (30.03%) |
| Q2 (≥ 15.7%, < 23.2%) | 3347 (26.67%) |
| Q3 (≥ 9.3%, < 15.7%) | 2614 (20.83%) |
| Q4 (< 9.3%) | 2819 (22.47%) |
| Charlson comorbidity index | |
| Mean (SD) | 0.8 (1.23) |
| No | 7153 (54.07%) |
| At least 1 | 6076 (45.93%) |
| Cancer histologic stage | |
| In situ | 506 (3.82%) |
| Localized | 6097 (46.09%) |
| Regional | 4316 (32.63%) |
| Distant | 1342 (10.14%) |
| Unstaged | 968 (7.32%) |
| AJCC Stage 6th | |
| Stage 0 | 883 (6.67%) |
| Stage I | 3132 (23.68%) |
| Stage II | 3294 (24.90%) |
| Stage III | 2921 (22.08%) |
| Stage IV | 1208 (9.13%) |
| Unstaged | 1791 (13.54%) |
| Surgery | |
| No | 1314 (9.93%) |
| Yes | 11915 (90.07%) |
| Radiation | |
| No | 11382 (86.04%) |
| Yes | 1847 (13.96%) |
| Chemotherapy | |
| No | 9041 (68.34%) |
| Yes | 4188 (31.66%) |
‡ Origin recode NHIA was applied to define Hispanic group.
§Quartile was based on distribution of all covered zip code. There were some patients without data.