Breast cancer can be caused by smoking
The U.S. Surgeon General said in 2004 that “there was no cause-and-effect relationship between smoking and breast cancer risk”.
“It’s not just a relationship between alcohol and breast cancer, but in fact smoking by itself is related to breast cancer. Women who started smoking before their first menstrual period were 61% more likely to get breast cancer than nonsmokers. Women who took up the smoking habit after their period had started were at 45% higher risk”
Mia Gaudet, Director of Genetic Epidemiology, American Cancer Society.
“This paper is another important step toward the conclusion that smoking is a risk factor (for breast cancer) on its own”
James Lacey, an associate professor of cancer etiology at the City of Hope Comprehensive Cancer Center in Duarte, California.
The researchers analyzed data from a large, long-term cancer society study involving lifestyle factors and prevention on more than 73,000 women, over 14 years:
- Women who start smoking before their first menstrual period are 61% more likely to get breast cancer than nonsmokers
- Women who took up smoking after their period had started were at 45% higher risk of breast cancer
- Invasive breast cancer risk is 24% higher in current smokers and 13% higher in former smokers, compared to never smokers
Study by Mia Gaudet, Director of Genetic Epidemiology, American Cancer Society, and colleagues, was published online February 28, 2013 in the Journal of the National Cancer Institute.