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在北美肺癌是男性肿瘤的主要死亡原因,近年美国女性肺癌也已超过乳腺癌成为最主要的肿瘤死因。以往研究证实,肺癌病因主要归因于吸烟,但北美每年仍有大量肺癌病例并非由吸烟所致。因此有必要研究吸烟以外的肺癌致病因素。本文报道1981至1985年在加拿大多伦多市进行的一项以全人群为基础的病例-对照研究结果。为比较男女性肺癌在吸烟状态及饮食因素方面的差异,男女性新发病
In North America, lung cancer is the main cause of death in male tumors. In recent years, female lung cancer in the United States has also surpassed breast cancer as the leading cause of cancer death. Previous studies have confirmed that the cause of lung cancer is mainly attributed to smoking, but North America still has a large number of cases of lung cancer that are not caused by smoking. Therefore, it is necessary to study the pathogenic factors of lung cancer other than smoking. This article reports a population-based case-control study conducted in Toronto, Canada from 1981 to 1985. To compare the differences in smoking status and dietary factors between male and female lung cancers, male and female sexuality