Assessment of radiation risks of malignant neoplasms among the population of Russian regions contaminated with radionuclides as a result of the Chernobyl accident

Some areas of the Russian Federation were contaminated with radionuclides released as a re-sult Chernobyl accident. The current paper clarifies some items previously published study based on NRER (National Radiation-Epidemiological Registry, Registry) data. pre-vious issue presented estimates radiation risks cancer incidence among population four most regions Federation: Bryansk, Kaluga, Oryol and Tula oblasts. Risks thyroid are estimated account screening effect. cohort con-sisted more than 327 thousand people resided in areas. average dose to children adolescents was 0.174 Gy, adults 0.035 Gy. Thyroid diagnosed 1549 members during follow-up period from 1991 over 2019, them 423 cases at accident 1126 adults. Significant increase ob-served exposed internally through intake iodine-131 young age. statisti-cally significant risk persists 30 years after exposure. de-creases increasing attained In before age 1 year reaching 20 years, coefficient excess relative (ERR/Gy) 4.61. Radiation associated is attributed 20.6% mem-bers radioiodine isotopes their childhood adoles-cence, 58% ra-diation under 4 Marked effect (ES) found disease diag-nosing, 5.6 for 2.1 There not statistically solid cancers, including induced breast females, radionuclides. Radia-tion leukemia also identified, although value men exceeded zero. Further observations persons will statistical power radiation-epidemiological studies clarify assessment human chronic exposure low doses.