International journal of radiation biology · 2001
Effect of prolonged radiation exposure on the thyroid gland of residents living in 60Co-contaminated rebar buildings.
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Chang T C, Chen W L, Chang W P, Chen C J
Аннотация
PURPOSE: To evaluate prolonged low dose-rate gamma-exposure effects on the thyroid glands of residents living in 60Co-contaminated steel buildings.
MATERIALS AND METHODS: Physical examination and ultrasonography of the thyroid, determination of thyroid function and anti-thyroid microsomal antibodies were performed for 1346 residents. Ultrasound-guided aspiration cytology was done for thyroid nodules. The study subjects were stratified by age at examination (< or = 15 and > 15 years), sex and exposure dose to the body. Dose-response data on the prevalence of various thyroid diseases were analysed by the multiple logistic regression analysis.
RESULTS AND CONCLUSIONS: The prevalence of simple goitre was related to the exposure with a dose-response relationship for males of all ages, and for females of < or = 15 years. There was a biological gradient of thyroid cyst prevalence with the increase in exposure dose for females of all ages. The prevalence of elevated serum tri-iodothyronine level showed a dose-response relationship for males of < or = 15 years. A significant increase in thyroid abnormalities with dose was observed for males of all ages, and for females of < or = 15 years.
MATERIALS AND METHODS: Physical examination and ultrasonography of the thyroid, determination of thyroid function and anti-thyroid microsomal antibodies were performed for 1346 residents. Ultrasound-guided aspiration cytology was done for thyroid nodules. The study subjects were stratified by age at examination (< or = 15 and > 15 years), sex and exposure dose to the body. Dose-response data on the prevalence of various thyroid diseases were analysed by the multiple logistic regression analysis.
RESULTS AND CONCLUSIONS: The prevalence of simple goitre was related to the exposure with a dose-response relationship for males of all ages, and for females of < or = 15 years. There was a biological gradient of thyroid cyst prevalence with the increase in exposure dose for females of all ages. The prevalence of elevated serum tri-iodothyronine level showed a dose-response relationship for males of < or = 15 years. A significant increase in thyroid abnormalities with dose was observed for males of all ages, and for females of < or = 15 years.