Azizova T, et al. – In this study that included a cohort of workers Russian Mayak nuclear enterprise who were occupationally exposed to ionizing radiation, researchers evaluated the risk of developing hypertension. Occupational exposure to external γ-rays was received by all workers. Some were also occupationally exposed to α-particles from internally deposited plutonium. Findings revealed a significant linear association of hypertension incidence with cumulative liver absorbed dose from external γ-rays: excess relative risk/Gy=0.14. There was no significant link between hypertension incidence and cumulative liver absorbed dose from internal α-particles: excess relative risk/Gy=−0.01. Compared with a Japanese cohort of atomic bomb survivors (Adult Health Study), a higher hypertension incidence risk was reported in this study cohort, but was lower than a corresponding estimate for Chernobyl clean-up workers.