Long-Term Colorectal Cancer Incidence and Mortality After a Single Negative Screening Colonoscopy
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View abstract on PubMed
Summary
This summary is machine-generated.A single negative colonoscopy significantly lowers colorectal cancer (CRC) risk and mortality. High-quality colonoscopy provides the most substantial and sustained protection against CRC incidence and death.
Area Of Science
- Gastroenterology
- Oncology
- Preventive Medicine
Background
- Current guidelines suggest 10-year intervals for screening colonoscopies, but supporting evidence is limited.
- The long-term impact of screening colonoscopy quality on colorectal cancer (CRC) risk is not well-established.
Purpose Of The Study
- To evaluate the long-term risk of colorectal cancer (CRC) and CRC-specific mortality following a single negative screening colonoscopy of either high or low quality.
Main Methods
- An observational study of 165,887 average-risk individuals aged 50-66 years who underwent a single screening colonoscopy.
- CRC incidence and mortality were compared to the general population using standardized incidence ratios (SIRs) and standardized mortality ratios (SMRs).
- High-quality colonoscopy was defined by complete examination, adequate bowel preparation, and an adenoma detection rate of ≥20% for the endoscopist.
Main Results
- Over up to 17.4 years of follow-up, CRC incidence and mortality were 72% and 81% lower, respectively, compared to the general population.
- High-quality colonoscopy was associated with a 2-fold reduction in CRC incidence and mortality compared to low-quality colonoscopy.
- Hazard ratios for CRC incidence remained significantly lower after high-quality colonoscopy across all follow-up periods (0-5, 5.1-10, and 10-17.4 years).
Conclusions
- A single negative screening colonoscopy is linked to reduced CRC incidence and mortality for up to 17.4 years.
- High-quality colonoscopy is crucial for achieving significant and sustained reductions in CRC incidence and mortality.
- These findings support the importance of colonoscopy quality in cancer prevention strategies.
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