Tsugane S, Watanabe S, Sugimura H, Urano Y, Matsubara S
Jpn J Cancer Res. 1987 Feb;78(2):162-9.
The recently increasing trend of lung cancer mortality in Japan was qualitatively analyzed. As the percentages of cases undergoing pathological autopsies in Tokyo were thirty for males and twenty-six for females during the period from 1979 to 1983, the histologically classified death rates in Tokyo could be estimated by combining the reported cases of death from lung cancer with the proportion of these of known histological type. The results indicated an increase in adenocarcinoma, and a decrease in squamous-cell carcinoma, except for the older age-group of men. The latter result suggested that the results were affected by the decreasing proportion of smokers and by the improvement in cigarette quality. The increase in small-cell and large-cell carcinoma, and the decrease in undifferentiated carcinomas, could be explained by problems associated with differing diagnostic standards. However, when these three different types of carcinoma were considered as a single type, the death rate was shown to be increased except in younger age-groups of women.
对日本近期肺癌死亡率上升的趋势进行了定性分析。1979年至1983年期间，东京男性病理尸检病例的比例为30%，女性为26%，因此通过将报告的肺癌死亡病例与已知组织学类型的比例相结合，可以估算出东京的组织学分类死亡率。结果表明，除老年男性外，腺癌发病率上升，鳞状细胞癌发病率下降。后一结果表明，这些结果受到吸烟者比例下降和香烟质量改善的影响。小细胞癌和大细胞癌的增加以及未分化癌的减少，可以用与不同诊断标准相关的问题来解释。然而，当将这三种不同类型的癌症视为单一类型时，除了年轻女性年龄组外，死亡率均显示上升。
