Dependence of the incidence level of non-oncologic diseases of the thyroid gland, in the post-natal period, on the time of gestation, in children of the Kaluzhsk region, exposed internally due to incorporation of anthropogenic iodine 131
Author: V.F. Gorobets
Reference: «Радиация и риск» (Radiation and Risk), 2011
Keywords: children, incidence, diseases of the thyroid gland, internal exposure, iodine 131, cohort research
Abstract: Research of 420 children, living in the south-west of the Kaluzhsk region, during 12 years after prenatal exposure to iodine 131. Cohort method is implemented. A control group of 150 children, from the same region, is also examined for comparison. The incidence in the exposed children, in utero, compared to not exposed ones, was 2.6 times higher. The incidence depends on the time of gestation, at which iodine 131 was incorporated. The highest incidence and relative risks were detected in two subgroups: 1. Prenatal “radiation period”: 4-12th weeks, 2. 16-22th weeks. This radiobiological research shows the increased activity of the thyroid gland, in terms of absorbing radioactive iodine, in certain periods of gestation.