Research into relationship between dose and non-cancer thyroid diseases among population of the Kaluga oblast who were affected by radioiodine isotopes following the Chernobyl accident in their childhood

«Radiation and Risk», 2006, vol. 15, No. 1-2, pp.22-37

Authors

Ivanov V.K., Chekin S.Yu., Maksioutov M.A., Vlasov O.K., Gorsky A.I., Shchukina N.V., Taratorkina N.N.
Medical Radiological Research Center of RAMS, Obninsk.

Abstract

Corrected procedure for estimation of thyroid dose with the use of radiometry measurements developed at the Medical Radiological Research Center of RAMS is given in the article. The procedure was intended to be used for estimation of thyroid dose in territories of low level of contamination with radionuclides, which are similar to those in the Kaluga oblast. Radiation risks for non-cancer thyroid diseases in residents (2 005 persons) of Kaluga oblast exposed to radiation in their childhood were assessed. Statistically significant radiation risk (ERR/Gy=7.14, p<0.025) for thyroid goiter in those lived in Ulianovsky, Zhizdrinsky, Khvastovichsky rayons of Kaluga oblast at the age of 2-4 years at the time of exposure was found. Statistically significant radiation risk (ERR/Gy=12.02, p<0.05) for thyroid cysts, nodules and thyroiditis in the aggregate was found for the first time in people resided in the same rayons at the age of 5-10 years at exposure. The possibility that in the cohort the above diseases were caused by radiation is about 23%.

Key words
Low contamination of territories with radionuclides, assessment of radiation risks, non-cancer diseases, thyroid gland, children, Chernobyl accident, thyroid goiter risk, cysts, nodular diseases, thyroiditis.

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