Journal
BRITISH JOURNAL OF CANCER
Volume 99, Issue 11, Pages 1940-1945Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/sj.bjc.6604775
Keywords
breast cancer; incidence; ionising radiation; low-dose rate exposure; Techa River
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Funding
- Chelyabinsk Oblast Oncology Dispensary
- Russian Ministry of Health
- Russian Federal Medical-Biological Agency
- United States Department of Energy [DE-FC0204EH04014]
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In the 1950s, the Mayak nuclear weapons facility in Russia discharged liquid radioactive wastes into the Techa River causing exposure of riverside residents to protracted low-to-moderate doses of radiation. Almost 10 000 women received estimated doses to the stomach of up to 0.47 Gray (Gy) (mean dose = 0.04 Gy) from external gamma-exposure and Cs-137 incorporation. We have been following this population for cancer incidence and mortality and as in the general Russian population, we found a significant temporal trend of breast cancer incidence. A significant linear radiation dose-response relationship was observed (P = 0.01) with an estimated excess relative risk per Gray (ERR/Gy) of 5.00 (95% confidence interval (CI), 0.80, 12.76). We estimated that approximately 12% of the 109 observed cases could be attributed to radiation.
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