II. The risk of smoking disease
pathogenic role of smoking bị Proven through many studies in the world as well as in our country. Ie -1 cigarette Himself made life lost 5.5 minutes. The average lifespan of smokers are shorter lignite-smokers from 5 to 8 years. Smoking increases the mortality rate from 30 to 80%, mainly Due to the cancer (lung cancer), chronic obstructive pulmonary disease, cardiovascular disease. ... The level of risk depends on age Increased start to smoke (smoking as soon the Higher the risk), the number of smoking-year average is calculated by the unit number of covered drugs taking the average multiplied by the daily-number of years- (số smoking-how, in tăng the Higher risk) and time-the longer the risk is greater cũng.
A. smoking and cancer
In the US there are many studies on the association giữa tobacco use and cancer Conducted past tense, the study about a third có Estimates of the total number of deaths from cancer related to tobacco use. Smoking Causes 90% of the total khoảng number of People dying of lung cancer and smoking in many other cancer Causes cũng parts như the throat, larynx, esophagus, the Dedication, the uterus, cervix, kidney, bladder, intestines and rectum.
1 . lung cancer
Nearly 50 years ago, Doll and Hill have Shown That Causes lung cancer and smoking to lung cancer mortality increases with Due the amount of tobacco. The world Incidence lung cancer in 60 years tăng quite fast, Increased More Than The main other types of cancer and this ratio shows the relation with the number of smokers Increased. Low rates in lung cancer is not common những Populations.
Smoking is the main cause, of lung cancer, about 87% of new cases of Incidence us in 1996 is 177,000 Due to smoking, the rest are other Due to Causes, như Environmental pollution, occupational Diseases, eating, and genetic Factors. 90% of 660,000 cases was diagnosed with lung cancer every year in the world's smokers. Giả sử the risk of Those Who Suffer did not smoke lung cancer is 1, then the risk of lung cancer of smokers 10 times in non-smokers, Higher coal. The level of risk varies phụ thuộc Increased type of cancer cells on the, squamous cell carcinomas of the risk of small-cell carcinoma in smokers and 5 to 20 times while Increased risk of carcinoma and large the cell carcinoma 2 to 5 times tăng Higher coal the non- smokers.
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