1977年作者曾第一次报道美国和日本生活方式相关性癌死亡率的差异及发展趋势。由于多年来两国吸烟、饮酒和饮食习惯一直在不断变化,癌发生率和死亡率也一定随之改变。因此,作者认为有必要对此再次进行研究探讨。通过对1955～1985年50～64岁日本土著和美国白人大量生态学资料的详尽分析,发现两国所有恶性肿瘤年龄特异死亡率增加的数字相 For the first time in 1977, the authors reported differences in life-style cancer death rates and trends in the United States and Japan. As smoking, drinking, and eating habits have been changing over the years in both countries, the incidence of cancer and mortality have certainly changed. Therefore, the author thinks it is necessary to research and discuss it again. Based on a detailed analysis of a large number of ecological data from Japanese natives and American whites aged 50-64 years from 1955 to 1985, it was found that all age-specific mortality rates for all malignancies in both countries increased