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Five-year surveillance was noninferior to three years after high-risk adenoma removal at interim analysis

The New England journal of medicine (PubMed)Sep 17, 2026

AI-summarized from the linked source. Educational brief, not medical advice.

Brief summary

In an ongoing European noninferiority trial, beginning surveillance colonoscopy five years after high-risk adenoma removal was noninferior to beginning at three years for five-year cumulative colorectal cancer incidence in a prespecified interim analysis.

What NurseJet pulled from the source

Among 10,799 randomized patients, five-year colorectal cancer incidence was 0.77% with first surveillance at five years and 0.82% with first surveillance at three years. The -0.05 percentage-point difference met the trial's interim noninferiority criterion.

Why this matters for nurses

Nurses coordinate surveillance referrals, bowel-preparation education, and follow-up after polyp removal. The trial may inform future interval decisions, but an interim result does not independently change a patient's current surveillance plan.

Bedside takeaway

Treat the five-year result as interim evidence and keep each patient's surveillance tied to the documented gastroenterology plan.

Key takeaways

  • The trial enrolled patients with at least one adenoma 10 mm or larger, high-grade dysplasia or villous growth, or 3 to 10 adenomas.
  • The upper boundary of the one-sided 99.12% confidence interval was 0.68 percentage points, below the prespecified 0.7-point noninferiority margin.
  • This was a 5.5-year interim analysis of an ongoing 10-year trial; five colorectal cancer deaths had occurred across both groups.

Practice implications

  • Confirm the documented pathology, recommended surveillance interval, and responsible follow-up clinician at transition points. Reinforce the prescribed preparation and scheduling plan, and route overdue or conflicting recommendations to the gastroenterology team rather than changing the interval independently.

Limitations & cautions

  • Abstract-only summary of an interim analysis. The final primary endpoint is colorectal cancer incidence at 10 years, inverse-probability weighting addressed missing surveillance data, and the enrolled European high-risk-adenoma population may not represent every surveillance setting.
  • AI-summarized from the linked source. Review the original article before applying to practice.

Citations

Exact source links

Public citations are filtered to exact credible source pages. Homepage-only or invalid links stay in admin review and are not shown here.

The New England journal of medicine (PubMed)

The New England journal of medicine (PubMed). Colonoscopy Intervals and Colorectal Cancer Incidence after Adenoma Removal.

Open original source

https://pubmed.ncbi.nlm.nih.gov/42748427/

Professional education only

This summary does not replace clinical judgment, facility policy, provider orders, or official guidelines. Verify practice changes against the original source and local protocol.

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