Adenoma findings at index colonoscopy | Surveillance interval recommendation | Interval considered appropriate* | |
---|---|---|---|
June 1998–2001 | ≥2 adenomas | 12 months (1 year) | 9–15 months |
1 adenoma | 24–36 months (2–3 years) | 18–42 months | |
Since 2002 | ≥3 adenomas | 36 months (3 years) | 30–42 months |
1 or 2 adenomas | 72 months (6 years) | 66–78 months |
*Appropriate interval is ±3 months for a 1-year interval recommendation and ±6 months for longer interval recommendations.