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自第二次世界大战以来,日本疾病谱迅速改变,传染病减少或消灭,而慢性非传染性疾病例如癌症、中风和心脏病一直在增加。1950年非传染性疾病占总死亡原因的32.7%,而现已跃升至70%左右。癌症是1980年日本最常见死亡原因,占总死亡数的23.9%。胃癌现时虽仍为主要的恶性肿瘤,但趋势表明不消几年将被肺癌所取代。本调查目的是观察肺癌死亡率的长远趋势,比较性别和城乡之间的差别,并澄清特别是男性肺癌增多的原因。肺癌数据取自日本厚生省1947～1980年
Since the Second World War, the spectrum of diseases in Japan has rapidly changed, infectious diseases have been reduced or eliminated, and chronic non-communicable diseases such as cancer, stroke and heart disease have been on the rise. The non-contagious diseases in 1950 accounted for 32.7% of the total deaths and now has risen to around 70%. Cancer is the most common cause of death in Japan in 1980, accounting for 23.9% of the total number of deaths. Although gastric cancer is still the main malignancy, the trend shows that it will be replaced by lung cancer in just a few years. The purpose of this survey was to look at the long-term trend of lung cancer mortality by comparing the differences between sex and urban and rural areas and clarifying the causes of lung cancer in men, in particular. Lung cancer data were taken from Japan’s Ministry of Health and Welfare 1947 ~ 1980