Invited Commentary: Missing Doses in the Life Span Study of Japanese Atomic Bomb Survivors
A partir des données de la cohorte "Life Span Study ", cette étude américaine ré-évalue l'exposition à des doses de rayonnements ionisants chez des survivants japonais des bombes atomiques à Hiroshima et Nagasaki et son association avec la mortalité par cancer
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;000(0):3000–000) 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.
American Journal of Epidemiology , commentaire, 2013