RADIATION EPIDEMIOLOGIC ANALYSIS OF THE DATA OF THE NATIONAL CHERNOBYL REGISTRY OF RUSSIA - PROGNOSTICATION AND FACTS 9 YEARS AFTER THE ACCIDENT

In 1986, immediately after the Chernobyl accident, the Ministry of Pub lic Health of the USSR adopted a large-scale programme to establish in the country the All-Union Distribution Registry of persons affected b y radiation. Towards 1992 (by the time of the disintegration of the US SR) the data base of the Registry included medical and dosimetric info rmation for 659,292 men and that for 284,919 emergency workers (liquid ators). All republics of the former Soviet Union as well as a wide ran ge of scientific and practical institutions were involved in establish ment of the registry. At present there is medical and dosimetric infor mation for 370,120 men, including that for 159,027 liquidators of the accident, in the National Chernobyl Registry of Russia. Medical inform ation (added annually) and dosimetric data allow radiation-epidemiolog ical studies to be carried out on determination of possible dose depen dence of morbidity, invalidism and mortality indices for persons affec ted by radiation and to compare actual data with prognostication estim ates. In particular, epidemiological studies conducted in accordance w ith the case control technology of thyroid cancer diseases in children of the Bryansk region made it possible to determine a value of relati ve risk at the dose of 1 Gy which is equal to 7.15 (1.52; 33.8).