Can smoking get lung cancer?

First of all, define a smoker: smoke 1 pack of ordinary brand cigarettes every day (because some foreign cigarettes are much better than domestic ones and it is difficult to get them) for 20 years. This kind of person is temporarily defined as a smoker.

Therefore, 654.38+10,000 men over the age of 40 who have never smoked and have not been exposed to cigarettes for a long time, and 654.38+10,000 people over the age of 40 who smoked in Shanghai were randomly selected. According to the follow-up, 30 people in the former group died of lung cancer, and 600 people in the latter group. Is that clear? Relationship between lung cancer and smoking.

In other words, even if you smoke heavily, the probability of getting lung cancer is actually only 6/ 1000, which is generally publicized outside. The probability of smokers suffering from lung cancer will increase by 20 times, which sounds terrible.