RERF is monitoring mortality and cancer incidence in persons born between May 1946 and December 1984 to the Life Span Study (LSS) survivors. As of 2007, cohort members ranged in age from 23 to 61, with a mean age of 47 years. To date, there has been no evidence of increased cancer incidence or increased mortality from cancer or other diseases either up to age 20 or after age 20. Much longer follow-up is needed to reach any conclusions regarding the effects of parental A-bomb exposure on disease occurrence, since most of the disease occurrence in this cohort is still in the future. The Table shows recent summaries of mortality data for this F₁ cohort.

Table. Adjusted hazard ratio for cancer and non-cancer mortality before and after 20 years of age in F₁ offspring. No statistically significant increase in hazard ratio has been observed for cancer or non-cancer mortality.

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