1 1000 s9sosa tT oqosssa | L yos062 IT yoesee | L 1967-70 11 1971-74 | / RATE 100 F- 10 . wee 700+ RAD 0-9 RAD peo PLa a I O- 10- 20-35-50 0- 10- 20- 35- 50 G- to- 20- 35-500 10- 20- 35-500 10- 20- 35-50 0- 10. 20- 35-50 9 19 3449 + 9 19 34 49 + 2 19 34 49 +9 19 34 49 + 9 19 34 49 + 9 19 34 49 + AGE ATB Figure XVII. Death rates (per 100.000 persons per year) from all diseases except neoplasms by age at the time of the bombing in Hiroshima and Nagasakt, durtng the pertod 1950-1974, plotted for each 4-year pertod separately for the group receiving 100+ rad (heavy line) or 0-9 rad (ltght line). The rates were adjusted for eity and sex within time pertods. Data from Beebe, Kato and Land [Bek}. death rates for all non-tumorous causes (taken at 4 years intervals and adjusted for city and sex within each time period) separately calculated for the group receiving 0-9 rad and that exposed to 100+ rad were superimposable (see Figure XVII). This finding, as repeatedly pointed out, cannot be reconciled with the hypothesis that radiation may accelerate natural aging, but rather shows that any life-shortening present in the sample is associated with cancer induction. 376. The contrast between the Japanese data and the data on occupational ex- posure of American radiologists and their mortality prior to 1950 was specifieally discussed in the last publications [B23, B24], particularly in view of the most recent evidence of Matanoski et al. [M28, M29] (see paragraphs 353-355). It was pointed out that either the contrast groups in the occupational expe- rience (radiologists against other medical specialists) were confounded by factors other than irradiation or that there are intrinsic differences in the