Demographics of the study population (n=29 969) and interval cancer (IC) cases (n=162)
| Characteristics | Whole cohort, N (%) | Colonoscopy IC cases, N (%) |
|---|---|---|
| Age | ||
| Mean age, years (SD) | 59.8 (SD 5.8) | 60.6 (SD 5.4) |
| 50–59 | 16 630 (55.5) | 71 (43.8) |
| 60–69 | 13 339 (44.5) | 91 (56.2) |
| Gender | ||
| Female | 15633 (52.2) | 80 (49.4) |
| Male | 14336 (47.8) | 82 (50.6) |
| Faecal haemoglobin concentration (μg Hb/g faeces) | ||
| 20–49 | 11 706 (39.1) | 42 (25.9) |
| 50–99 | 6495 (21.7) | 31 (19.1) |
| 100–149 | 2707 (9.0) | 22 (13.6) |
| ≥150 | 7548 (25.2) | 63 (38.9) |
| Not specified | 1513 (5.0) | 4 (2.5) |
| Received colonoscopy in settings with adenoma detection rate (%) | ||
| >30 | 5132 (17.1) | 19 (11.7) |
| 15–30 | 23 209 (77.5) | 127 (78.4) |
| <15 | 1628 (5.4) | 16 (9.9) |
| Index colonoscopy findings | ||
| No adenoma | 18 132 (60.5) | 90 (55.6) |
| Non-advanced adenoma only | 7812 (26.1) | 47 (29.0) |
| Advanced adenoma | 4025 (13.4) | 25 (15.4) |