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据加拿大卫生部门的一项新的研究结果报道,被动吸烟可使从不吸烟的妇女患乳腺癌的危险性增高一倍。来自于回顾性研究的结果显示,长期暴露于(20年)吸二手烟(或被动吸烟)环境的妇女与绝经期前发生乳腺癌的危险性增高一倍有关,并可使绝经后妇女患乳腺癌的危险性增高30％。研究还发现,长期主动吸烟(吸烟35年或更长时间)的妇女绝经期前患乳腺癌的危险性高达90％,绝经后的危险性高达60％。
According to a new study by Health Canada, passive smoking has doubled the risk of breast cancer among women who never smoke. Results from retrospective studies show that women who have long-term exposure to (20 years) second-hand smoke (or passive smoking) environments have a doubling of the risk of breast cancer before menopause and can cause breast cancer in postmenopausal women. The risk of cancer increases by 30%. The study also found that long-term active smoking (35 years or more) women had a 90% risk of breast cancer before menopause and a postmenopausal risk of 60%.