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==Life span studies of atomic bomb survivors== Survivors of the atomic bomb explosions at Hiroshima and Nagasaki, Japan have been the subjects of a Life Span Study (LSS), which has provided valuable epidemiological data. The LSS population went through several changes: 1945 There were some 93,000 individuals, either living in Hiroshima or Nagasaki, Japan; 1950 An additional 37,000 were registered by this time, for a total of 130,000 LSS members. However, some 44,000 individuals were censured or excluded from the LSS project, so there remained about 86,000 people who were followed through the study. There is a gap in knowledge of the earliest cancer that developed in the first few years after the war, which impacts the assessment of leukemia to an important extent and for solid cancers to a minor extent. Table 1 shows summary statistics of the number of persons and deaths for different dose groups. These comparisons show that the doses that were received by the LSS population overlap strongly with the doses that are of concern to NASA Exploration mission (i.e., 50 to 2,000 mSv). Figure 1 shows the dose response for the excess relative risk (ERR) for all solid cancers from Preston et al. Tables 2 and 3 show several summary parameters for tissue-specific cancer mortality risks for females and males, respectively, including estimates of ERR, excess absolute risk (EAR), and percentage attributable risks. Cancer incidence risks from low-LET radiation are about 60% higher than cancer mortality risks. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Epidemiology data for low-linear energy transfer radiation」の詳細全文を読む スポンサード リンク
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