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  • Multiple primary cancers among colorectal cancer survivors in Queensland, Australia, 1996–2007

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    85619_1.pdf (261.9Kb)
    Author(s)
    Dasgupta, Paramita
    Youlden, Danny R
    Baade, Peter D
    Griffith University Author(s)
    Baade, Peter D.
    Youlden, Danny R.
    Year published
    2012
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    Abstract
    Purpose To quantify the demographic and clinical factors associated with an increased risk of multiple primary cancers (MPCs) among colorectal cancer survivors. Methods Standardized incidence ratios for MPCs were calculated for residents of Queensland, Australia, who were diagnosed with a first primary colorectal cancer between 1996 and 2005 and survived for at least 2 months. Relative risk ratios were calculated for all MPCs combined and selected individual sites using multivariate Poisson models. Results A total of 1,615 MPCs were observed among 15,755 study patients. The cohort had a significant excess risk of developing ...
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    Purpose To quantify the demographic and clinical factors associated with an increased risk of multiple primary cancers (MPCs) among colorectal cancer survivors. Methods Standardized incidence ratios for MPCs were calculated for residents of Queensland, Australia, who were diagnosed with a first primary colorectal cancer between 1996 and 2005 and survived for at least 2 months. Relative risk ratios were calculated for all MPCs combined and selected individual sites using multivariate Poisson models. Results A total of 1,615 MPCs were observed among 15,755 study patients. The cohort had a significant excess risk of developing subsequent colorectal (SIR = 1.47, 95 % CI 1.30-1.66) or non-colorectal (SIR = 1.24, 95 % CI 1.18-1.31) cancers relative to the incidence of cancer in the general population. Age at initial diagnosis, follow-up time, initial colorectal subsite, and surgical treatment were independently associated (p < 0.01) with the overall risk of developing MPCs after adjustment. The relative risk ratio was 1.23 (95 % CI 1.07-1.41) for those aged 20-59 years compared with the 70-79 age group and 0.82 (95 % CI 0.72-0.92) for 1-5-year follow-up relative to the first year. The likelihood of being diagnosed with a MPC was 33 % higher (95 % CI 1.12-1.56) for surgically treated patients and 45 % higher (95 % CI 1.29-1.64) after proximal colon cancers relative to rectal cancer. Conclusions While these population-based results do not incorporate all possible risk factors, they form an important foundation from which to further investigate the etiological causes that result in the development of MPCs among colorectal cancer survivors.
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    Journal Title
    Cancer Causes & Control
    Volume
    23
    Issue
    8
    DOI
    https://doi.org/10.1007/s10552-012-9990-1
    Copyright Statement
    © 2012 Springer Netherlands. This is an electronic version of an article published in Cancer Causes & Control, August 2012, Volume 23, Issue 8, pp 1387-1398. Cancer Causes & Control is available online at: http://link.springer.com/ with the open URL of your article.
    Subject
    Oncology and carcinogenesis
    Oncology and carcinogenesis not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/52090
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    • Journal articles

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