Invited commentary: missing doses in the life span study of Japanese atomic bomb survivors - PubMed (original) (raw)

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. 2013 Mar 15;177(6):569-73.

doi: 10.1093/aje/kws474. Epub 2013 Feb 20.

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Invited commentary: missing doses in the life span study of Japanese atomic bomb survivors

K Ozasa et al. Am J Epidemiol. 2013.

Abstract

The Life Span Study is a long-term epidemiologic cohort study of survivors of the atomic bombs dropped on Hiroshima and Nagasaki, Japan. In this issue of the Journal, Richardson et al. (Am J Epidemiol. 2013;177(6):562-568) suggest that those who died in the earliest years of follow-up were more likely to have a missing dose of radiation exposure assigned, leading to a bias in the radiation risk estimates. We show that nearly all members of the cohort had shielding information recorded before the beginning of follow-up and that much of the alleged bias that Richardson et al. describe simply reflects the geographic distribution of shielding conditions for which reliable dosimetry was impossible.

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