Demographic baseline of patients captured with colorectal cancer in the NIHR HIC colorectal cancer research database form three pilot sites
| Characteristic | Value |
| Number of participants | 12 903 (100%) |
| Cancer site | |
| C18—colon | 4920 (38.1%) |
| C19—rectosigmoid | 1171 (9.1%) |
| C20—rectum | 2699 (20.9%) |
| Not known yet | 4997 (38.7%) |
| Age at diagnosis | |
| Age, years, median (IQR) | 68.4 (58.1–77.3) |
| Not known yet | 4997 (38.7%) |
| Sex | |
| Male | 7223 (56.0%) |
| Female | 5504 (42.7%) |
| Not known | 176 (1.4%) |
| Ethnicity | |
| White | 9222 (71.5%) |
| Not stated | 1575 (12.2%) |
| Other ethnic groups | 786 (6.1%) |
| Asian or Asian British | 554 (4.3%) |
| Black or Black British | 396 (3.1%) |
| Mixed | 77 (0.6%) |
| Not known | 293 (2.3%) |
| Smoking status | |
| Current or ex-smoker | 2912 (22.6%) |
| Non-smoker | 3793 (29.4%) |
| Not known | 6964 (54.0%) |
| Body mass index | |
| Median (IQR) | 25.8 (22.9–29.2) |
| Not known | 3220 (25.0%) |
| Treatment | |
| Neoadjuvant | 3708 (28.7%) |
| Adjuvant | 962 (7.5%) |
| Local excision | 291 (2.3%) |
| Radical resection | 3715 (28.8%) |
| Not known yet | 5749 (44.6%) |
| Mortality and follow-up | |
| Number of deaths | 5090 (39.4%) |
| Years from diagnosis to mortality, median (IQR) | 0.9 (0.3–2.0) |
| Years from diagnosis to last follow-up, median (IQR) | 2.4 (0.8–4.6) |
HIC, Health Informatics Collaborative; NIHR, National Institute for Health Research.