Navigation Links
Study Finds Smoking Linked to Breast Cancer Risk
Date:3/2/2011

By Steven Reinberg
HealthDay Reporter

TUESDAY, March 1 (HealthDay News) -- Both smoking and exposure to secondhand smoke appear to increase the risk for breast cancer among postmenopausal women, new research shows.

Although earlier studies had found little or no connection between breast cancer and smoking, as more women smokers reach menopause the connection may be surfacing for the first time, experts noted.

"The findings are important because smoking was not previously thought to increase the risk of breast cancer, but this study adds to the increasing evidence that it does," said lead researcher Dr. Karen Margolis, a senior clinical investigator at HealthPartners Research Foundation in Minneapolis.

However, Susan Gapstur, vice president of epidemiology for the American Cancer Society, said earlier research had shown some connection between smoking and breast cancer.

"When you put together the body of work in the last few years, it calls for more studies," she said. "This study has answered that call."

"This certainly adds to the evidence that long-term smoking increases the risk for breast cancer," Gapstur said. "On the on the flip side, it appears that 20 years after stopping the risk goes down to that of an average individual. I think that's good news."

Many risk factors for breast cancer cannot be changed, such as age, genetics and family history of the disease, Margolis noted.

"Now smoking can be added to the list of things that can lower breast cancer risk that already include having children, breast-feeding, keeping alcohol consumption low, avoiding weight gain, being physically active and avoiding hormone therapy with estrogen plus progestin," she said.

The report is published in the March 1 online edition of the BMJ.

For the study, Margolis's group collected data on 79,990 women aged 50 to 79 who took part in the Women's Health Initiative study. Over 10 years of follow-up, 3,250 women developed breast cancer.

As part of the study, the women were asked if they smoked, had stopped smoking or had never smoked. The women were also asked about their exposure to secondhand smoke at home and at work.

The researchers found that women who smoked had a 16 percent increased risk of developing breast cancer. Among women who quit, the increased risk was 9 percent, they added.

The greatest risk was for women who had smoked for 50 years or longer, compared with women who never smoked, Margolis's team found. The risk was also high for women who started smoking when they were teenagers. Even after quitting, the risk continued for up to 20 years, the researchers noted.

"We also observed some evidence that extensive exposure to passive smoking may raise the risk of breast cancer," Margolis said.

Nonsmokers exposed to secondhand smoke for more than 10 years as children, more than 20 years as adults at home and more than 10 years at work had a 32 percent increased risk of developing breast cancer, the researchers found.

However, the link between breast cancer and secondhand smoke was seen in those exposed to the greatest amount of passive smoking and "therefore more research is needed to confirm these findings," the researchers noted.

Dr. Paolo Boffetta, deputy director of the Tisch Cancer Institute and Institute for Transitional Epidemiology at Mount Sinai School of Medicine in New York City and co-author of an accompanying journal editorial, said that "tobacco smoking, particularly when started early in life, may increase the risk of breast cancer."

"This evidence is becoming stronger and stronger," he said. "In previous studies, the evidence was not so strong. It is only now that women who started smoking in large numbers are getting to the age where the risk of breast cancer is getting high."

Right now, the association between smoking and breast cancer is still not a sure thing, Boffetta said, "but, it is getting more likely."

More information

For more information on breast cancer, visit the American Cancer Society.

SOURCES: Karen Margolis, M.D., M.P.H., senior clinical investigator, HealthPartners Research Foundation, Minneapolis; Susan Gapstur, vice president, epidemiology, American Cancer Society; Paolo Boffetta, M.D., M.P.H., deputy director, Tisch Cancer Institute and Institute for Transitional Epidemiology, Mount Sinai School of Medicine, New York City; March 1, 2011, BMJ, online


'/>"/>
Copyright©2010 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Heart Devices Not Tested Enough in Women: Study
2. Study Rates Success of Corneal Transplants in Kids
3. Half of U.S. Men Infected With HPV, Study Reveals
4. A small subset of normal white blood cells gives rise to a rare leukemia, study shows
5. Study: Happiness improves health and lengthens life
6. New study: Medical and financial impact of drug-related poisonings treated in US EDs
7. Study links vitamin D to lung cancer survival
8. Global ISU study: Invasive species widespread, but not more than at home range
9. Sugary Drinks Might Raise Hypertension Risk: Study
10. Hospital use of virtual colonoscopy is on the rise, study suggests
11. For Severe Sinusitis, Oral Steroids an Option, Study Says
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Study Finds Smoking Linked to Breast Cancer Risk 
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Marcy was in a crisis. Her son ... lash out at his family verbally and physically. , “When something upset him, he couldn’t ... would use it. He would throw rocks at my other children and say he was ...
(Date:6/24/2016)... CA (PRWEB) , ... June 24, 2016 , ... ... is now offering micro-osteoperforation for accelerated orthodontic treatment. Dr. Cheng has extensive experience ... Damon brackets , AcceleDent, and accelerated osteogenic orthodontics. , Micro-osteoperforation is ...
(Date:6/24/2016)... ... June 24, 2016 , ... People across the U.S. are ... Code Talker Award, an essay contest in which patients and their families pay tribute ... presented at the 2016 National Society of Genetic Counselors (NSGC) Annual Education Conference (AEC) ...
(Date:6/24/2016)... ... June 24, 2016 , ... Puradigm® & Innovative Solutions ... initiated cultivation and processing operations at its production facility, and opened its first ... is the manufacturer of a complete system of proactive air and surface purification ...
(Date:6/24/2016)... (PRWEB) , ... June 24, 2016 , ... Venture ... Golf Classic Tournament held on June 20th at the Woodmont Country Club at ... Luke’s Wings, an organization dedicated to helping service members that have been wounded in ...
Breaking Medicine News(10 mins):
(Date:6/23/2016)... , June 23, 2016 , ... Thursday, July 7, 2016 , , , , LOCATION: , ... , , , , EXPERT PANELISTS:  , , , Frost ... Industry Analyst, Christi Bird; Senior Industry Analyst, Divyaa Ravishankar and Unmesh ... The global pharmaceutical industry is witnessing an exceptional era. Several ...
(Date:6/23/2016)... LONDON , June 23, 2016 ... environments  Oticon , industry leaders in ... the launch of Oticon Opn ™, the world,s ... world of possibilities for IoT devices.      ... Opn, Oticon introduces a number of ,world firsts,: ...
(Date:6/23/2016)... -- Research and Markets has announced the ... (United States, China, Japan, Brazil, United Kingdom, Germany, France, ... Surgical Procedure Volumes: ... provides surgical procedure volume data in a geographic context. ... analysis of growth drivers and inhibitors, including world population ...
Breaking Medicine Technology: