Prevalence of proximal neoplasia (PCN) and proximal advanced neoplasia (PAN) at full colonoscopy according to a finding of distal colorectal adenoma (index adenoma) at flexible sigmoidoscopy (FS) among 1833 participants
| Adenoma characteristics in individuals with index adenomas at FS | No of subjects (n=1833) | PCN (n=387) | PAN (n=85) |
|---|---|---|---|
| Values in parentheses indicate percentages of individuals with the given characteristic relative to the total number of individuals with an index adenoma. | |||
| Adenoma <10 mm | 1510 | 295 (20) | 50 (3) |
| Adenoma ≥10 mm | 323 | 92 (28) | 35 (11) |
| Mild/moderate dysplasia | 1721 | 353 (21) | 75 (4) |
| Severe dysplasia | 112 | 34 (30) | 10 (9) |
| No villous components | 1676 | 347 (21) | 66 (4) |
| Villous components | 157 | 40 (25) | 19 (12) |
| Solitary adenoma | 1502 | 285 (19) | 55 (4) |
| Multiple adenomas | 331 | 102 (31) | 30 (9) |
| Female | 702 | 129 (18) | 23 (3) |
| Male | 1131 | 258 (23) | 62 (6) |
| Age 50–54 years | 502 | 72 (14) | 13 (3) |
| 55–59 years | 802 | 173(22) | 35 (4) |
| 60–64 years | 529 | 142 (27) | 37 (7) |
| Distal low risk adenoma | 1417 | 270 (19) | 43 (3) |
| Distal high risk adenoma | 416 | 117 (28) | 42 (10) |