Table 1.
Characteristics of individuals, endoscopy centre and findings at baseline colonoscopy.
| Number (%) | |
|---|---|
| FIT-positive individuals undergoing colonoscopy | 253,833 |
| Female | 105,511 (41.6) |
| Age, median years (IQR) | 69 (63–72) |
| Endoscopy centre | |
| Academic | 7854 (3.1) |
| Non-academic | 196,158 (77.3) |
| Private practice | 49,821 (19.6) |
| Median duration of follow-up, months | 36 (21–57) |
| Findings at baseline colonoscopy | |
| No polyp | 70,468 (27.8) |
| At least one serrated polyp and adenoma | 48,264 (19.0) |
| At least one serrated polyp | 64,223 (25.3) |
| ≥1 hyperplastic polyp | 49,262 (19.4) |
| ≥1 sessile serrated lesion | 21,357 (8.4) |
| ≥1 sessile serrated lesion with dysplasia | 2911 (1.1) |
| ≥1 traditional serrated adenoma | 2125 (0.8) |
| Serrated polyp <10 mm | 38,948 (15.3) |
| Serrated polyp ≥10 mm | 9829 (3.9) |
| Serrated polyp of unknown size | 28,137 (11.1) |
| 1–4 low-risk sessile serrated lesion(s) | 20,850 (8.2) |
| ≥5 low-risk sessile serrated lesions | 507 (0.2) |
| At least one adenoma | 167,545 (66.0) |
| ≥1 tubular adenoma | 145,028 (57.1) |
| ≥1 tubulovillous adenoma | 54,806 (21.6) |
| ≥1 villous adenoma | 3427 (1.4) |
| ≥1 adenoma with high grade dysplasia | 9796 (3.9) |
| Adenoma <10 mm | 100,076 (39.4) |
| Adenoma ≥10 mm | 69,331 (27.3) |
| Adenoma of unknown size | 77,928 (30.7) |
| 1–4 low-risk adenoma(s) | 93,715 (36.9) |
| ≥5 low-risk adenomas | 5815 (2.3) |