Department of Statistics

The Radiation Effects Research Foundation (RERF) in Hiroshima and Nagasaki, Japan, is a binational foundation supported by the Japanese and U.S. governments and is recognized throughout the world as a leader in the study of radiation health effects. It studies the health of Japanese atomic-bomb survivors in several large cohorts, including a cohort whose members have participated in biennial health examinations over a period of decades, and conducts fundamental research on the health effects of ionizing radiation and its interactions with genes, lifestyle, and environment.

Historically, the Department of Statistics has led the development of methods for radiation risk estimation including pioneering development of Poisson regression methods and related software, correction for dose uncertainty (i.e., error in the independent variable of the risk regression), specialized sub-cohort sampling designs, and other innovative methods for epidemiology.

More recently, the Department has focused on methods for joint analysis of longitudinal and survival data, imputation of missing data, causal inference methods and mediation, and methods for high-dimensional data and genomics. RERF data provide a rich resource and laboratory for the development and application of novel statistical methods. The Department provides statistical support for all epidemiological, laboratory, and clinical research activities at RERF through collaboration with researchers from other departments on study design, data analysis, and reporting.

The Department is also responsible for the management of the radiation dosimetry system, which includes organization and management of the data and computer programs used for dose estimation and the computation of dose estimates for survivors in the RERF study groups.

The Department is located in the Hiroshima laboratory, in Hijiyama Park, not far from downtown Hiroshima. Hijiyama Park affords a spectacular view of Hiroshima and splendid cherry blossoms in the spring.




Research Scientists and their Research Interests