Cancer [7] According to the data of the Centers for Disease Control and Prevention, smoking is the chief culprit leading to the death of 15 1322 cancer patients in the United States every year. Most of these deaths-116990 people died of lung cancer. According to the data of the Center for Disease Control, male smokers are 22 times more likely to die of lung cancer than non-smokers. The probability of female smokers dying of lung cancer is 12 times that of non-smokers. [8] Statistical data research has long shown that non-smokers live longer than smokers, and since the 1950s, scientists have discovered the correlation between smoking and the incidence of lung cancer through statistical data. [9] Earlier this year, a study by Gerd pfeiffer of Beckman Institute accurately pointed out the carcinogens inherent in cigarette smoke. These carcinogens attack certain parts of genes, which are found to be prominent in some cancers. [10] Pfajfer wrote in the journal Science that smoking has changed the p53 gene, which plays an anti-cancer role under normal circumstances, but when it mutates, it will accelerate the development of cancer. [1 1] Another research report published by the American Cancer Society says that cigarettes with low nicotine content can't reduce the possibility of cancer, but they are actually the chief culprit of a cancer that enters the deep tissues of the lungs. Other cancers can also be affected by smoking. Earlier this year, a study by the American Cancer Society showed that smoking increased the risk of men dying from prostate cancer, while other studies linked smoking to the increased risk of other cancers, including laryngeal, breast and colon cancer.
[13] Smoking is repeatedly associated with cardiovascular diseases, and the biggest killer is heart disease. According to CDC data, smoking tripled the risk of middle-aged male and female smokers dying of heart disease.
[14] Studies have also shown that the risk of death from stroke, aneurysm, hypertension and other cardiovascular diseases has also increased.
Respiratory diseases
[15] Smoking is considered as a hidden danger leading to death from pneumonia, chronic bronchitis or emphysema. According to CDC data, the risk of smokers dying of bronchitis and emphysema is nearly 10 times higher than that of non-smokers.
Other diseases
[16] A report recently published in the American Journal of Epidemiology shows that smoking can increase people's risk of developing non-insulin-dependent diabetes by more than three times.
[17] Studies have pointed out that smoking may lead to blindness, senile brain injury, Alzheimer's disease and other types of dementia. Effect of smoking on pregnancy
[18] Pregnant women who smoke will pass nicotine and carbon monoxide to the fetus through the placenta. Studies have shown that this will deprive the fetus of oxygen and nutrition needed for development, which may cause harm to the fetus and lead to premature delivery or underweight. According to the American Lung Association, 20% to 30% of underweight babies, as many as 65,438+04% of premature births and about 65,438+00% of infant deaths are caused by smoking during pregnancy. Mothers who smoke may also pass nicotine to their babies through breastfeeding.