Abstract
The registration of death and disease for atomic bomb survivors is not be enforced at the present time. Research workers have been depending on the limited data in some area to study on a statistical problem of atomic bomb survivors and, some times, samples studied were not adequate to represent the atomic bomb survivors in the whole. Investigators should take considerations in this point.
The author calculated expected death rates of atomic bomb survivors in Hiroshima Prefecture applying death rates by sex and age of all Japan, Hiroshima Prefecture and the medical records from ABCC. The population of atomic bomb survivors over 15 years was of National Census in Hiroshima Prefecture 1960. Death rates of both all Japan and Hiroshima Prefecure over 15 years were also of 1960. The mortality in the medical records of ABCC was of October 1950-June 1958.
In the comparison between expected death rates of atomic bomb survivors and actual death rates of all Japan or Hiroshima Prefecture over 15 years, the former rates were always higher than the latter in male, female and both sexes. The expected death rate of male atomic bomb survivors showed the highest discrepancy from the actual death rate of all Japan male over 15 years, being 60% higher than the latter. A medical record of ABCC, i.e. ST-100 sample, seemed to be not adequate to represent the atomic bomb survivors in Hiroshima Prefecture.
