Outline of the Radiation Epidemiological Cohort Studies for Leukemia among Nuclear Workers and A-bomb Survivors

Abstract

The risk of leukemia related with radiation exposure was pointed out in a case report of a physician in 1911 and in subsequent reports. After that, many cohort studies among nuclear workers have been conducted in various countries on the leukemia risk at low dose and/or low dose rate radiation. However, these studies did not have consistent conclusions. INWORKS and UK NRRW cohort studies argued high risk with leukemia excluding chronic lymphocytic leukemia (CLL) mainly due to chronic