Table 3.
Most advanced lesion on follow-up colonoscopy
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Most advanced lesion on initial colonoscopy | Normal | Metaplastic polyp | Simple adenoma | Multiple simple adenomas | High risk adenoma | Colorectal cancer |
Normal (n=545) | 406 (73) | 53 (10) | 78 (15) | 3 (1) | 5 (1) | 0 (0) |
Metaplastic polyp (n=67) | 34 (52) | 17 (25) | 13 (19) | 1 (1) | 2 (3) | 0 (0) |
Simple adenoma (n=112) | 51 (49) | 16 (14) | 35 (30) | 6 (5) | 3 (2) | 1 (1) |
Multiple simple adenomas (n=12) | 3 (29) | 2 (18) | 5 (41) | 2 (13) | 0 (0) | 0 (0) |
High risk adenoma (n=23) | 4 (26) | 4 (21) | 8 (34) | 3 (7) | 4 (12) | 0 (0) |
Percentages are of the number with each initial finding and are adjusted for age and sex.