発生炉工肺がんの疫学的研究

概要

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Deaths due to lung cancers seen among gas generator workers in Yawata Iron and Steel Works were pursued over the past 35 years (1933 to 1968) by the occupational lung cancer study groups of Yawata Iron and Steel Works Hospital and many papers as regards this problem have been reporte. Kuroda and Kawahata reported for the first time 20 cases of lung cancer seen from 1933 to 1937. Later, Nishiyori et al. added three similar cases seen between 1946 and 1952. In 1953, the gas generator plant was closed and its workers were all transferred to othrer plants of the same works. Nishiyori et al. reported three cases seen from 1953 to 1955 among ex-gas generator workers who had experienced the operation until 1953, while Kawai et al. added six cases found between 1956 and 1964. Since 1965, the latter gourp did not find a case of lung cancer among the ex-gas generator workers still employed in the works, but they found six cases among the ex-gas generator workers who retired at 55 years of age during the period from 1953 to 1968. Mortality from the lung cancer of these workers has been analysed by applying the retrospective cohort method, revealing that the mortality is remarkably elevated according to the degree of exposure and that such elevated risk remains even after the workers have left the works by retirement.
社団法人日本産業衛生学会の論文
1969-01-20