Smoking is an important risk factor for colorectal cancer

Many studies have shown that smoking is an important risk factor for colorectal cancer, and there is a dose-response relationship between smoking years and total amount. Including the publication Of the International Journal Of Cancer titled Smoking and Horse cancer: A pooled analysis of 10 population-based cohort studies in Japan is the latest study by Japanese scholars.

Several studies have concluded that compared with nonsmokers, people with a history of smoking have a higher risk of colorectal cancer. Current smokers had a 14 percent increased risk of colorectal cancer, and former smokers had a 17 percent increased risk.

The higher the intensity of smoking, the higher the risk of colorectal cancer. Compared with never-smokers, those who smoked 20 cigarettes a day had a 14 percent increased risk of colorectal cancer; Those who smoked 40 cigarettes a day had a 31 percent increased risk of colorectal cancer.

The longer you smoke, the higher your risk of colorectal cancer. Compared with those who had never smoked, those who had smoked for 20 years had a 9% increased risk of colorectal cancer; People who had smoked for 40 years had a 20 percent increased risk of colorectal cancer.

The higher the cumulative number of cigarettes smoked, the higher the risk of colorectal cancer. Cumulative smoking of 20 packs per year increased the risk of colorectal cancer by 10%, and cumulative smoking of 40 packs per year increased the risk by 20%.

Compared with current smokers, those who quit smoking for more than 25 years had a significantly lower risk of colorectal cancer.