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Colorectal cancer rates in Canada

July 31, 2019

Bottom Line: The incidence of colorectal cancer among younger adults increased in recent years in this analysis of data from Canadian national cancer registries that included about 688,000 new colorectal cancers diagnosed over more than 40 years. Among men younger than 50, there was an average annual percentage change of 3.47% from 2006 to 2015. Among women younger than 50, there was an average annual percentage change of 4.45% from 2010 to 2015. Because the study used registry data, authors didn't have access to any demographic information other than age so they were unable to identify what other factors may be associated with the increases. Potential reasons to explain the increases are not well understood and the authors suggest that be investigated before any change in screening guidelines is pursued.

Authors: Darren R. Brenner, Ph.D., University of Calgary, Alberta, Canada, and coauthors

(doi:10.1001/jamanetworkopen.2019.8090)

Editor's Note: Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, funding and support, etc.
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About JAMA Network Open: JAMA Network Open is the new online-only open access general medical journal from the JAMA Network. Every Wednesday and Friday, the journal publishes peer-reviewed clinical research and commentary in more than 40 medical and health subject areas. Every article is free online from the day of publication.

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