Abstract
Purpose
Men with diabetes have been found to have a reduced risk of prostate cancer (PCa), potentially due to detection bias from lower prostate-specific antigen (PSA) levels or inhibition of tumor growth. Understanding if lower PCa rates are due to a lower risk of the disease or a detection bias from PSA testing can help inform the benefits and harms from prostate cancer screening.
Methods
We used data from the Prostate, Lung, Colorectal, and Ovarian (PLCO) Screening Trial to assess the impact of PSA screening on PCa in men with diabetes and the potential role of detection bias and/or slower tumor growth. Comparing men by diabetes status, we calculated age-adjusted incidence rates by tumor grade and compared screening results, PSA levels, and tumor characteristics.
Results
Men with diabetes had lower rates of PCa but was limited to low- and intermediate-grade tumors. Men with diabetes were less likely to be biopsied after their first positive screening test and men diagnosed with low/intermediate-grade tumors had significantly more advanced tumors with higher PSA levels.
Conclusions
Our findings provide additional evidence that detection bias is likely contributing to the lower rates of low- and intermediate-grade prostate cancers.
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Change history
30 November 2018
In the original publication of the article, the categories of PSA levels among the subpopulation of men diagnosed with prostate cancer were published incorrectly in Table 4. The corrected Table 4 is given in this Correction.
30 November 2018
In the original publication of the article, the categories of PSA levels among the subpopulation of men diagnosed with prostate cancer were published incorrectly in Table 4. The corrected Table 4 is given in this Correction.
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Miller, E.A., Pinsky, P.F. & Pierre-Victor, D. The relationship between diabetes, prostate-specific antigen screening tests, and prostate cancer. Cancer Causes Control 29, 907–914 (2018). https://doi.org/10.1007/s10552-018-1067-3
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DOI: https://doi.org/10.1007/s10552-018-1067-3