Relations between known and unknown cause of death and predictors of survival*
| Number (%)* | ||||||
|---|---|---|---|---|---|---|
| Colorectal cancer | Non-colorectal cancer | Unknown cause | Total (100%) | χ2 test | Two sided p value | |
| *Cases where values for prognostic variables are not known are not included. | ||||||
| Overall | 2369 (73.4) | 781 (24.2) | 78 (2.4) | 3228 | ||
| Age | ||||||
| <65 | 545 (87.1) | 68 (10.9) | 13 (2.1) | 626 | 101.7 (6) | <0.001 |
| 65–74 | 733 (75.3) | 221 (22.7) | 20 (2.1) | 974 | ||
| 75–85 | 765 (68.0) | 333 (29.6) | 27 (2.4) | 1125 | ||
| 85+ | 325 (64.7) | 159 (31.7) | 18 (3.6) | 502 | ||
| Sex | ||||||
| Male | 1208 (71.8) | 434 (25.8) | 41 (2.4) | 1683 | 4.94 (2) | 0.085 |
| Female | 1161 (75.1) | 347 (22.5) | 37 (2.4) | 1545 | ||
| Dukes’s stage | ||||||
| A | 49 (31.0) | 98 (62.0) | 11 (7.0) | 158 | 371.9 (8) | <0.001 |
| B | 403 (56.2) | 289 (40.3) | 25 (3.5) | 717 | ||
| C | 471 (73.4) | 154 (24.0) | 17 (2.6) | 642 | ||
| D | 934 (85.9) | 139 (12.8) | 14 (1.3) | 1087 | ||
| Unknown | 512 (82.1) | 101 (16.2) | 11 (1.8) | 624 | ||
| Site | ||||||
| Colon | 1459 (73.2) | 493 (24.7) | 42 (2.1) | 1994 | 2.71 (2) | 0.259 |
| Rectum/rectosigmoid | 909 (73.7) | 288 (23.4) | 36 (2.9) | 1233 | ||
| Comorbidities | ||||||
| 0 | 1340 (80.7) | 284 (17.1) | 37 (2.2) | 1661 | 118.9 (4) | <0.001 |
| 1 | 729 (69.4) | 299 (28.4) | 23 (2.2) | 1051 | ||
| 2+ | 300 (58.1) | 198 (38.4) | 18 (3.5) | 516 | ||
| Specialist treatment | ||||||
| Yes | 888 (71.9) | 313 (25.3) | 34 (2.8) | 1235 | 2.6 (2) | 0.272 |
| No | 1480 (74.3) | 468 (23.5) | 44 (2.2) | 1992 | ||
| Procedure | ||||||
| Elective | 1531 (70.8) | 568 (26.3) | 62 (2.9) | 2161 | 1.5 (2) | 0.484 |
| Emergency or incidental | 335 (69.8) | 135 (28.1) | 10 (2.1) | 480 | ||
| Deprivation | ||||||
| Affluent | 538 (76.4) | 149 (21.2) | 17 (2.4) | 704 | 13.5 (4) | 0.009 |
| Medium | 579 (72.2) | 196 (24.4) | 27 (3.4) | 802 | ||
| Deprived | 1201 (73.0) | 419 (25.5) | 25 (1.5) | 1645 | ||