Passive smoking can cause breast cancer

Regular inhalation of second-hand smoke is enough to lead to breast cancer, especially in premenopausal women. The danger level is equivalent to active smoking.

"The time has come to strengthen restrictions on cigarette smoke in all environments ," said Dr. Kenneth C. Johnson, Canada Public Health Agency.

Johnson explored the relationship between breast cancer risk and smoking (both passive and active) by analyzing 19 previously published studies. The results showed that regular passive smoking for a long time increased the average risk of breast cancer by 27% in women who never smoked. In some studies, this risk is up to 80-90%.

In 14 studies, " the relationship between smoking and the risk of pre-menopausal cancer is significant, increasing by 68% in people who are exposed to permanent and long-term smoke, despite their lifetime. never touched a cigarette ". This risk is up to 119% in the remaining 5 reports.

Compared to women who never smoke smoke, those who actively smoke have an increased risk of 46%, even up to 108% in some studies.

My Linh ( according to Reuters )