Demographic details and bowel symptoms in those who had rectal biopsies
| Controls | Group 1b | Group 2 | |
| n | 12 | 21 | 10 |
| Age | 58 (40–76) | 50 (28–69) | 44 (23–64) |
| Sex (F/M) | 9/3 | 13/8 | 6/4 |
| Bowel frequency | 1 (0–2) | 1 (0.3–3) | 3.5 (1–10) |
| Days urgent | 0 | 1 (0.3–3) | 2 (1–7) |
| No (%) bowel habit normal | 100 | 14 (67) | 0 |