Prevalence of clinical-feature recordings in each pre-diagnostic period
| Cancer diagnosis | Total (N = 7549) | |||||
|---|---|---|---|---|---|---|
| Colon(n = 5033) | Rectal (n = 2516) | |||||
| Variable | n | % | n | % | n | % |
| Clinical features | ||||||
| Abdominal pain | ||||||
| 0–1 year | 1305 | 25.9 | 271 | 10.8 | 1576 | 20.9 |
| 1–2 years | 262 | 5.2 | 72 | 2.9 | 334 | 4.4 |
| Change in bowel habit | ||||||
| 0–1 year | 1091 | 21.7 | 787 | 31.3 | 1878 | 24.9 |
| 1–2 years | 236 | 4.7 | 117 | 4.7 | 353 | 4.7 |
| Rectal bleeding | ||||||
| 0–1 year | 584 | 11.6 | 810 | 32.2 | 1394 | 18.5 |
| 1–2 years | 82 | 1.6 | 63 | 2.5 | 145 | 1.9 |
| Constitutional symptoms | ||||||
| 0–1 year | 436 | 8.7 | 123 | 4.9 | 559 | 7.4 |
| 1–2 years | 170 | 3.4 | 47 | 1.9 | 217 | 2.9 |
| Other bowel function | ||||||
| 0–1 year | 165 | 3.3 | 57 | 2.3 | 222 | 2.9 |
| 1–2 years | 41 | 0.8 | 17 | 0.7 | 58 | 0.8 |
| Abdominal mass | ||||||
| 0–1 year | 83 | 1.6 | 21 | 0.8 | 104 | 1.4 |
| 1–2 years | 7 | 0.1 | 5 | 0.2 | 12 | 0.2 |
| Abnormal blood tests | ||||||
| Low haemoglobin | ||||||
| 0–1 year | 1417 | 28.2 | 231 | 9.2 | 1648 | 21.8 |
| 1–2 years | 213 | 4.2 | 55 | 2.2 | 268 | 3.6 |
| High inflammatory markers | ||||||
| 0–1 year | 1392 | 27.7 | 463 | 18.4 | 1855 | 24.6 |
| 1–2 years | 367 | 7.3 | 127 | 5.0 | 494 | 6.5 |
| High platelets | ||||||
| 0–1 year | 932 | 18.5 | 244 | 9.7 | 1176 | 15.6 |
| 1–2 years | 142 | 2.8 | 52 | 2.1 | 194 | 2.6 |
a Abdominal mass includes codes for abdominal and rectal or perianal masses.