Table 2.
Clinicopathologic characteristics of 3,723 polyps
| Variable | 2002 Group (n = 1,277) | 2012 Group (n = 2,446) | p value |
|---|---|---|---|
| Location | 0.012 | ||
| Cecum | 80 (6.2) | 90 (3.7) | |
| Ascending colon | 259 (20.3) | 544 (22.2) | |
| Hepatic flexure | 57 (4.5) | 98 (4.0) | |
| Transverse colon | 217 (17.0) | 387 (15.8) | |
| Splenic flexure | 13 (1.0) | 21 (0.9) | |
| Descending colon | 138 (10.8) | 287 (11.7) | |
| Sigmoid colon | 291 (22.8) | 611 (25.0) | |
| Rectum | 222 (17.4) | 408 (16.7) | |
| Right:left | 626 (49.0):651 (51.0) | 1,140 (46.6):1,306 (53.4) | 0.767 |
| Shape | < 0.001 | ||
| Pedunculated | 64 (5.0) | 28 (1.1) | |
| Subpedunculated | 87 (6.8) | 395 (16.1) | |
| Sessile | 552 (43.2) | 1,433 (58.6) | |
| Flat | 574 (45.0) | 590 (24.2) | |
| Size, mma | 0.6 ± 0.4 | 0.4 ± 0.3 | < 0.001 |
| Diminutive | 613 (48.0) | 1,790 (73.2) | |
| Small | 429 (33.6) | 541 (22.1) | |
| Large | 235 (18.4) | 115 (4.7) | |
| Histology | < 0.001 | ||
| Neoplastic polyp | |||
| Tubular adenoma | 786 (61.6) | 1,334 (54.5) | |
| Tubulovillous | 21 (1.6) | 21 (0.9) | |
| Villous adenoma | 4 (0.3) | 4 (0.2) | |
| Serrated adenoma | 3 (0.2) | 13 (0.5) | |
| Adenocarcinoma | 11 (0.9) | 7 (0.3) | |
| Non-neoplastic polyp | 435 (34.1) | 1,063 (43.4) | |
| Othersb | 17 (1.3) | 4 (0.2) |
Values are presented as number (%) or mean ± standard deviation.
a
Diminutive, < 5 mm; small, ≥ 5 to < 10 mm; large, ≥ 10 mm.
b
Adenomatous change, 15; atypical gland, 2; eosinophilic infiltration, 1; fat necrosis, 2; xanthoma, 1.