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经流行病学调查和临床观察已确证吸烟与某些器官癌有统计学上的相关。根据现有调查可以认为25%的癌症死亡病例与吸烟有关。因此吸烟是致癌环境因素的最常见的来源。在这方面研究的最深入的是吸烟习惯与支气官癌发病机理之间的关系。气官癌的发生主要与每日的吸烟量,烟内有害物质含量和吸烟时间长短有关。据世界卫生组织估计,90%的男子肺癌和85%的女子肺癌是吸烟所致。据吸烟十分普遍而又有可靠医学统计资料的国家
Epidemiological investigation and clinical observation have confirmed that smoking and some organ cancer have a statistically significant correlation. According to the existing survey, 25% of cancer deaths can be considered related to smoking. Therefore, smoking is the most common source of carcinogenic environmental factors. The most in-depth study in this area is the relationship between smoking habits and the pathogenesis of bronchial carcinoma. The main reason for the occurrence of gas-related cancer is the amount of daily smoking, the amount of harmful substances in the cigarette and the duration of smoking. According to the World Health Organization estimates, 90% of men’s lung cancer and 85% of women’s lung cancer is caused by smoking. According to smoking is very common and reliable medical statistics countries