Table 1. Characteristics of the 4302 colorectal cancer precursor lesions from population-based screening.
| Conventional adenomas | Serrated adenomas | HGIN (n%) | ||||
|---|---|---|---|---|---|---|
| TA (n%) | TVA (n%) | VA (n%) | SA (n%) | HPs (n%) | ||
| Total | 2816(65.6) | 463(10.8) | 22(0.5) | 85(2.0) | 765(17.8) | 151(3.5) |
| gender | ||||||
| male | 1752(40.7) | 299(7.0) | 6 | 55(1.3) | 425(9.9) | 91(2.1) |
| female | 1064(24.7) | 164(3.8) | 16(0.4) | 30(0.7) | 340(7.9) | 60(1.4) |
| location | ||||||
| Right colon | 1096(25.5) | 136(3.2) | 6 | 17 | 217(5.0) | 38(0.9) |
| Left colon | 1720(40.0) | 327(7.6) | 16 | 68(1.9) | 548(12.7) | 113(2.6) |
| age | ||||||
| <40 | 31(0.7) | 3 | 0 | 0 | 10 | 0 |
| 40-49 | 490(11.4) | 69(1.6) | 1 | 13 | 152(3.5) | 16 |
| 50-59 | 976(22.7) | 150(3.5) | 8 | 29 | 266(6.2) | 50(1.2) |
| 60-69 | 995(23.1) | 171(4.0) | 12 | 34 | 259(6.2) | 66(1.5) |
| 70-79 | 308(7.2) | 66(1.5) | 1 | 8 | 74(1.7) | 16 |
| ≥80 | 16(0.4) | 4 | 0 | 1 | 4 | 3 |
TA= Tubular adenoma, TVA= Tubulovillous adenoma, SA= Serrated adenoma, VA= Villous adenoma, HPs= Hyperplastic polyps, HGIN= High grade intraepithelial neoplasia