High salt leels in the diet, long-term occupational dust exposure, and heay alcohol use (more than 10 wine drinks per week) each increased the risk of lung cancer death by more than twofold.

• 其中食盐量过高，在职业中长期接触粉尘和酗酒（每周超过10次以上）是最重要的肺癌死亡因素。