据ＢＭＪ 2 0 0 2 ,32 5 :30 5报道　美国纽约布朗克斯区阿尔贝特·爱因斯坦医学院的研究者用队列研究调查吸烟与乳腺癌的关系发现 ,吸烟超过 4 0年的妇女比从不吸烟的妇女患乳腺癌几率高 6 0 %,4 0多年每天吸烟 2 0支者增加危险达 83%。调查从1980年开始 ,对象为吸烟 4 0年的 According to the BMJ 2 0 0 2, 32 5: 30 5 Reported by researchers from the Albert Einstein College of Medicine in the Bronx, New York, United States A cohort study of the relationship between smoking and breast cancer found that women who smoked for more than 40 years There was a 60% higher risk of breast cancer among women who never smoked, and a further 83% risk of smoking 20 cigarettes per day over 40 years. The survey started in 1980 and targeted at 40 years of smoking