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Clinical characteristics of the patients by treatment group
| Folic acid (n = 15) | Placebo (n = 16) | |
| No of adenomas | ||
| 1 | 11 (73%) | 11 (69%) |
| 1–3 | 3 (20%) | 5 (31%) |
| >3 | 1 (7%) | 0 (0%) |
| Type of adenoma | ||
| Tubular | 2 (13%) | 1 (6%) |
| Tubulovillous | 11 (73%) | 12 (75%) |
| Villous | 2 (13%) | 2 (13%) |
| Serrated | 0 (0%) | 1 (6%) |
| Degree of dysplasia | ||
| Mild | 3 (20%) | 2 (13%) |
| Moderate | 9 (60%) | 9 (56%) |
| Severe | 3 (20%) | 4 (25%) |
Values are number (%) of patients.
