肺癌和什么因素有关?绝大部分人都会回答:吸烟。确实如此,吸烟是引起肺癌的最重要原因,吸烟者比不吸烟者发生肺癌的概率要大14～24倍。但是,吸烟并不是引起肺癌的唯一因素,在肺癌患者中,吸烟者(包括被动吸烟者)只占全部患者的50%～60%。除吸烟外,空气污染、电离辐射、放射性元素乃至日常饮食习惯都可能诱发肺癌,这也 What are the factors associated with lung cancer? Most people will answer: Smoking. Indeed, smoking is the most important cause of lung cancer. Smokers are 14 to 24 times more likely to develop lung cancer than non-smokers. However, smoking is not the only factor that causes lung cancer. Among lung cancer patients, smokers (including passive smokers) account for only 50% to 60% of all patients. In addition to smoking, air pollution, ionizing radiation, radioactive elements and even daily eating habits may induce lung cancer.