Smoking, particularly of cigarettes, is by far the main contribu

Smoking, particularly of cigarettes, is by far the main contributor to lung cancer. Cigarette smoke contains over 60 known carcinogens, including radioisotopes from the radon decay sequence, nitrosamine, and benzopyrene. Additionally, nicotine appears to depress the immune response to malignant growths in exposed tissue. Across the developed world, almost 90% of lung cancer deaths are caused by smoking. In the United States, smoking is estimated to account for 87% of lung cancer cases (90% in men and 85% in women). Among male smokers, the lifetime risk of developing lung cancer is 17.2%; among female smokers, the risk is 11.6%. This risk is significantly lower in nonsmokers: 1.3% in men and 1.4% in women.

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• Women who smoke -JoshuaChow- ♂ (570 bytes) () 10/26/2010 postreply 08:36:10

• The time a person smokes (as well as rate of smoking) increases -JoshuaChow- ♂ (471 bytes) () 10/26/2010 postreply 08:38:21

• Passive smoking—the inhalation of smoke from another's smoking—i -JoshuaChow- ♂ (462 bytes) () 10/26/2010 postreply 08:40:10

• 10–15% of lung cancer patients have never smoked. -JoshuaChow- ♂ (330 bytes) () 10/26/2010 postreply 08:42:37