The Offspring of the Liquidators of the Consequences of Mayak PA Accident in 1957: the Cohort Composition

Purpose: To compose and to give characteristics of the cohort of the 1st generation offspring of men who took part in liquidation of the consequences of the 1957 accident at Mayak PA. Material and methods: The Registry of individuals who took part in liquidation of the consequences of Mayak PA accident in 1957 and the Registry of Ozyorsk residents exposed to anthropogenic radiation in childhood due to operation of the first nuclear facility in Russia were the sources of information. Results: A cohort of the 1st generation offspring of male liquidators of 1957 accident was composed and described. The number of children born in 1958‒1992 is 4753 individuals. The life status is determined for 98.9 %. It was stated that 25.6 % of the children were born in the years of the accident liquidation, when maximum dose loads for the liquidators were observed. For the epidemiological study the groups were composed according to preconception doses of radiation exposure of men; at that, the mothers weren’t in contact with ionizing radiation sources. It was stated that the fathers of 13.0 % of the children had received doses over 500.0 mGy. The study cohort allows to perform epidemiological analyses of the effects of accidental exposure of the fathers.