Long-term irradiation effects in the population evacuated from the east-Urals radioactive trace area.

Changes in sex and age structure, mortality and reproductive function of 7854 persons exposed to radiation doses of 40-500 mSv in 1957 have been investigated. No statistically significant changes in the parameters studied have been revealed as compared to the same characteristics for the USSR and the province, and no clear trends with dose received have been observed. Changes found in the raw data can be attributed to the influence of the mean age in the dose groups. In order to confirm the absence of radiation effects it is necessary to refine the assessment of exposures and health affects to analyse data on the health state of the progeny, calculate individual doses and to ensure an adequate control.