Key clinical point: Participants invited to undergo a single screening colonoscopy had a modestly reduced risk for colorectal cancer (CRC) at 10 years than those who were assigned to no screening.
Major finding: At 10 years, the real-world risk for CRC was 18% lower among participants who were invited vs not invited to undergo screening colonoscopy (risk ratio 0.82; 95% CI 0.70-0.93), with the number needed to invite to undergo screening to prevent 1 case of CRC within 10 years being 455 (95% CI 270-1,429).
Study details: The findings are 10-year follow-up results of the NordICC trial including 84,585 participants who were randomly assigned to receive (invited group; n = 28,220) or not receive (usual-care group; n = 56,365) an invitation to undergo a single screening colonoscopy.
Disclosures: This study was funded by the Research Council of Norway, Nordic Cancer Union, and others. Some authors declared serving as expert witnesses or consultants for or receiving research support, speakers' fees, or consultancy fees from various sources.
Source: Bretthauer M et al. Effect of colonoscopy screening on risks of colorectal cancer and related death. N Engl J Med. 2022;387(17):1547-1556 (Oct 27). Doi: 10.1056/NEJMoa2208375