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作者应用了1955年至1975年日本的生命统计资料、1949年至1973年的营养普查结果、1965年开始的日本29个地方卫生中心对142,857名40岁以上妇女的十年前瞻性调查资料等,分析了近年来日本乳癌发病率的趋向及其危害因素。结果是,在过去20年中,乳癌的死亡人数成倍地增加,死亡率也稳步地上升:1955年死1,572人,死亡率为3.5/10万;1975年死3,262人,死亡率为5.8/10万。
The authors applied life-statistics data from 1955 to 1975, nutritional census results from 1949 to 1973, and a decade-long prospective survey of 142,857 women over the age of 40 at 29 local health centers in Japan starting in 1965, The trend of the incidence of breast cancer in Japan in recent years and its harmful factors were analyzed. As a result, the number of deaths from breast cancer has doubled over the past two decades and mortality has risen steadily: 1,572 deaths in 1955 with a death rate of 3.5 / 100,000; 3,262 deaths in 1975, with a mortality rate of 5.8 / 100,000.