Updated investigations of cancer excesses in individuals born or resident in the vicinity of Sellafield and Dounreay (original) (raw)
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A cross sectional cohort study was carried out of the population living downwind of and less than 3.5km from Trawsfynydd nuclear power station sited in Wales, UK. This station is cooled by, and discharges radionuclides to a lake, Llyn Trawsfyny-dd, which is significantly contaminated with radioactivity. Cancer numbers and populations were obtained through questionnaire and interview for the10-year period to 2005. Results showed that in the 3-years before the study was carried out, 2003-2005 and where completeness of data was most secure, there were significantly raised levels of cancer relative to England and Wales. Based on 490 males and 488 females the Standardised incidence ratios (SIR) for all ages were: All malignancy males 2.13 (obs: 22 exp: 10.5; 95%CI 1.34, 3.29; p<.002) All malignancy females 1.74 (obs 16, exp 9.2; CI 1.03, 2.92; p <0.05). Female breast 2.6 (obs 6, exp 2.3; CI 1.16, 5.79; p<0.03), Prostate 2.5 (obs5 exp 2.0; CI 1.01, 5.93; p <0.05), all leukemia 7.8 (obs 3, exp 0.38, p<0.007) all leukemia and lymphoma 6.5 (obs 4 exp 0.62, p<0.003), mesothelioma 18.0 (obs 2, exp 0.11, p<.005), pancreas 4.8 (obs 2 exp 0.42 p<.06). Cancer SIR were highest in the age group below 60 years in women where for breast cancer SIR was 4.9 (obs 5, exp 1.02; CI 2.02, 11.99; p< 0.004) There was an association with eating lake fish (RR = 2.1; p<0.04). Whilst owing to the structural problems associated with such studies caution should be exercised in quantitative interpretation, results show that they can be informative and that studies of adult cancer near nuclear facilities are likely to be more useful than studies of rare childhood cancer.
Medicine Cancer near Trawsfynydd Nuclear Power Station in Wales, UK: A Cross Sectional Cohort Study
A cross sectional cohort study was carried out of the population living downwind of and less than 3.5km from Trawsfynydd nuclear power station sited in Wales, UK. This station is cooled by, and discharges radionuclides to a lake, Llyn Trawsfyny-dd, which is significantly contaminated with radioactivity. Cancer numbers and populations were obtained through questionnaire and interview for the10-year period to 2005. Results showed that in the 3-years before the study was carried out, 2003-2005 and where completeness of data was most secure, there were significantly raised levels of cancer relative to England and Wales. Based on 490 males and 488 females the Standardised incidence ratios (SIR) for all ages were: All malignancy males 2.13 (obs: 22 exp: 10.5; 95%CI 1.34, 3.29; p<.002) All malignancy females 1.74 (obs 16, exp 9.2; CI 1.03, 2.92; p <0.05). Female breast 2.6 (obs 6, exp 2.3; CI 1.16, 5.79; p<0.03), Prostate 2.5 (obs5 exp 2.0; CI 1.01, 5.93; p <0.05), all leukemia 7.8 (obs 3, exp 0.38, p<0.007) all leukemia and lymphoma 6.5 (obs 4 exp 0.62, p<0.003), mesothelioma 18.0 (obs 2, exp 0.11, p<.005), pancreas 4.8 (obs 2 exp 0.42 p<.06). Cancer SIR were highest in the age group below 60 years in women where for breast cancer SIR was 4.9 (obs 5, exp 1.02; CI 2.02, 11.99; p< 0.004) There was an association with eating lake fish (RR = 2.1; p<0.04). Whilst owing to the structural problems associated with such studies caution should be exercised in quantitative interpretation, results show that they can be informative and that studies of adult cancer near nuclear facilities are likely to be more useful than studies of rare childhood cancer.