Table 1.
Demographic and Clinical Characteristics of Study Cohort (N = 1,151)
| Characteristic | Colon (n = 657) |
Rectal (n = 494) |
||
|---|---|---|---|---|
| No. | % | No. | % | |
| Age at diagnosis, years | ||||
| < 50 | 40 | 6.1 | 41 | 8.3 |
| 50-64 | 168 | 25.6 | 170 | 34.4 |
| 65-74 | 183 | 27.9 | 130 | 26.3 |
| ≥ 75 | 266 | 40.5 | 153 | 31.0 |
| Mean | 69.6 | 67.0 | ||
| SD | 12.1 | 12.4 | ||
| Sex | ||||
| Female | 353 | 53.7 | 174 | 35.2 |
| Male | 304 | 46.3 | 320 | 64.8 |
| Collaborative stage at diagnosis | ||||
| IIA | 176 | 35.6 | ||
| IIB | 90 | 13.7 | 41 | 8.3 |
| IIIA | 47 | 7.2 | 37 | 7.5 |
| IIIB | 357 | 54.3 | 146 | 29.6 |
| IIIC | 163 | 24.8 | 94 | 19.0 |
| District health authority | ||||
| With tertiary care center | 359 | 54.6 | 279 | 56.5 |
| Without tertiary care center | 298 | 45.4 | 215 | 43.5 |
| Residential location | ||||
| Urban | 423 | 64.4 | 322 | 65.2 |
| Rural | 226 | 34.4 | 167 | 33.8 |
| Unknown | 8 | 1.2 | 5 | 1.0 |
| Social deprivation index, quintile | ||||
| 0 (most deprived) | 117 | 17.8 | 92 | 18.6 |
| 1 | 148 | 22.5 | 105 | 21.3 |
| 2 | 131 | 19.9 | 96 | 19.4 |
| 3 | 133 | 20.2 | 101 | 20.4 |
| 4 (least deprived) | 124 | 18.9 | 99 | 20.0 |
| Unknown | 4 | 0.6 | 1 | 0.2 |
| Material deprivation index, quintile | ||||
| 0 (most deprived) | 144 | 21.9 | 104 | 21.1 |
| 1 | 140 | 21.3 | 95 | 19.2 |
| 2 | 139 | 21.2 | 120 | 24.3 |
| 3 | 130 | 19.8 | 101 | 20.4 |
| 4 (least deprived) | 100 | 15.2 | 73 | 14.8 |
| Unknown | 4 | 0.6 | 1 | 0.2 |
| Elixhauser comorbidity score | ||||
| 0 | 359 | 54.6 | 351 | 71.1 |
| 1 | 145 | 22.1 | 74 | 15.0 |
| ≥ 2 | 153 | 23.3 | 69 | 14.0 |
| No. of previous primary cancers (any type) | ||||
| 0 | 546 | 83.1 | 457 | 92.5 |
| 1 | 95 | 14.5 | 34 | 6.9 |
| ≥ 2 | 16 | 2.4 | 3 | 0.6 |
| Surgical presentation | ||||
| Emergency | 192 | 29.2 | 29 | 5.9 |
| Elective | 459 | 69.9 | 460 | 93.1 |
| Unknown | 6 | 0.9 | 5 | 1.0 |
| No. of lymph nodes examined | ||||
| < 12 | 373 | 56.8 | 322 | 65.2 |
| ≥ 12 | 260 | 39.6 | 162 | 32.8 |
| Unknown | 24 | 3.7 | 10 | 2.0 |
| Length of stay for hospital admission, days | ||||
| Mean | 17.9 | 14.8 | ||
| SD | 20.7 | 14.5 | ||
| Readmission within 30 days | 63 | 9.6 | 72 | 14.6 |
| Chemotherapy use | ||||
| Receipt of medical oncology consultation | 494 | 75.2 | 398 | 80.6 |
| Receipt of chemotherapy | 363 | 55.3 | 316 | 64.0 |
| Meeting the 12-week benchmark (for those receiving chemotherapy) | 286 | 78.8 | 211 | 66.8 |
Abbreviation: SD, standard deviation.