Table 1 Baseline characteristics of patients and large flat polyps
Characteristic | Number of patients |
|---|---|
Number of patients | 802 |
Age, mean ± SD (range), y | 65.4 ± 10.5 (31–92) |
Female, no. (%) | 321 (40) |
Polyp size, mean ± SD (range), mm | 34.1 ± 16.1 (20–150) |
Polyp location, no. (% of total) | |
Caecum | 187 (23.3) |
Ascending colon | 150 (18.7) |
Hepatic flexure | 71 (8.9) |
Transverse colon | 79 (9.9) |
Splenic flexure | 13 (1.6) |
Descending colon | 40 (5.0) |
Sigmoid colon | 82 (10.2) |
Rectum | 180 (22.4) |
Histology, no. (% of total) | |
Tubular adenoma | 254 (31.7) |
Tubulovillous adenoma | 372 (46.4) |
Villous adenoma | 9 (1.1) |
Adenocarcinoma | 90 (11.2) |
LGD (without SP with LGD) | 421 (52.5) |
HGD (without SP with HGD) | 214 (26.7) |
Serrated polyps | 77 (9.6) |
Hyperplastic polyps | 32 (4) |
Sessile serrated adenoma/polyp (SSA/P) without dysplasia | 32 (4) |
Sessile serrated adenoma/polyp (SSA/P) with LGD | 11 (1.37) |
Sessile serrated adenoma/polyp (SSA/P) with HGD | 2 (0.2) |