TABLE 1.
Basic characteristics of patient and polyp.
| Characteristic | Study population (N = 9,646) | |
| Patient age, mean (SD), range | 57.35 (11.827) | 17–92 |
| Patient sex, male: female (%) | Male 6,205, 64.3% | Female 3,441, 35.7% |
| N | % | |
| Adenoma size | ||
| <0.5 cm | 2,827 | 29.3 |
| 0.5–1 cm | 4,634 | 48.0 |
| 1–1.5 cm | 1,321 | 13.7 |
| 1.5–2 cm | 485 | 5.0 |
| 2–3 cm | 260 | 2.7 |
| >3 cm | 119 | 1.2 |
| Adenoma shape | ||
| Pedunculated | 2,894 | 30.0 |
| Sessile | 4,114 | 42.7 |
| Flat | 2,638 | 27.3 |
| Adenoma histology | ||
| Tubular | 8,877 | 92.0 |
| Tubulovillous | 304 | 3.2 |
| Villous | 15 | 0.2 |
| Serrated | 231 | 2.4 |
| HGD | 219 | 2.3 |
| Adenoma location | ||
| Proximal | 4,240 | 44.0 |
| Distal | 5,406 | 56.0 |
Adenomas reported are target adenomas (i.e., those with the most severe histology or maximum size). HGD, high-grade dysplasia. Distal = descending colon, rectum, and sigmoid colon; proximal = above the descending colon.