Featured Research

from universities, journals, and other organizations

Active Smoking Associated With Increased Risk Of Breast Cancer

Date:
January 7, 2004
Source:
Journal Of The National Cancer Institute
Summary:
Active smoking appears to play a larger role in the development of breast cancer than previously thought, according to a study in the January 7 issue of the Journal of the National Cancer Institute.

Active smoking appears to play a larger role in the development of breast cancer than previously thought, according to a study in the January 7 issue of the Journal of the National Cancer Institute. Tobacco smoke contains a number of human carcinogens, and metabolites of cigarette smoke have been found in the breast fluid of smokers. However, studies examining the association between tobacco smoke and breast cancer risk have yielded inconsistent results. Many studies have not been able to independently assess the contributions of the timing of exposure, age of diagnosis, or genetic susceptibilities to the overall risk of breast cancer. In addition, many of these studies did not consider passive smoking exposures, or exposure to secondhand smoke, among nonsmokers.

Peggy Reynolds, Ph.D., of the California Department of Health Services, and her colleagues examined breast cancer risk among 116,544 women in the California Teachers Study who had reported their smoking status on a survey given to them when they enrolled in the study.

Between 1996 and 2000, 2,005 of the women were diagnosed with invasive breast cancer. The incidence of breast cancer among current smokers was approximately 30% greater than that among women who had never smoked, irrespective of whether they were compared to women who had or had not been exposed to passive smoking. Analysis of subgroups of active smokers revealed increased breast cancer risks among women who started smoking before age 20, who began smoking at least 5 years before their first full-term pregnancy, and who had a longer duration of smoking or who smoked 20 or more cigarettes per day.

Current smoking was associated with increased breast cancer risk in women without a family history of breast cancer but not among women with a family history of the disease. There was no statistically significant increase in breast cancer risk among former smokers, and there was no evidence of an association between passive smoking exposure and breast cancer risk.

"Our results, which suggest that active smoking may be associated with an increased risk of breast cancer, argue for further research that can account for heterogeneity in individual susceptibility," the authors write. "Exposures to tobacco smoke, if causally related to breast cancer, could offer one of the few available modifiable avenues for preventing this disease."

###

Reynolds P, Hurley S, Goldberg DE, Anton-Culver H, Bernstein L, Deapen D, et al. Active smoking, household passive smoking, and breast cancer: Evidence from the California Teachers Study. J Natl Cancer Inst 2003;96:29–37.

Note: The Journal of the National Cancer Institute is published by Oxford University Press and is not affiliated with the National Cancer Institute. Attribution to the Journal of the National Cancer Institute is requested in all news coverage. Visit the Journal online at http://jncicancerspectrum.oupjournals.org/.


Story Source:

The above story is based on materials provided by Journal Of The National Cancer Institute. Note: Materials may be edited for content and length.


Cite This Page:

Journal Of The National Cancer Institute. "Active Smoking Associated With Increased Risk Of Breast Cancer." ScienceDaily. ScienceDaily, 7 January 2004. <www.sciencedaily.com/releases/2004/01/040107074305.htm>.
Journal Of The National Cancer Institute. (2004, January 7). Active Smoking Associated With Increased Risk Of Breast Cancer. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2004/01/040107074305.htm
Journal Of The National Cancer Institute. "Active Smoking Associated With Increased Risk Of Breast Cancer." ScienceDaily. www.sciencedaily.com/releases/2004/01/040107074305.htm (accessed October 1, 2014).

Share This



More Health & Medicine News

Wednesday, October 1, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Pregnancy Spacing Could Have Big Impact On Autism Risks

Pregnancy Spacing Could Have Big Impact On Autism Risks

Newsy (Oct. 1, 2014) A new study says children born less than one year and more than five years after a sibling can have an increased risk for autism. Video provided by Newsy
Powered by NewsLook.com
Robotic Hair Restoration

Robotic Hair Restoration

Ivanhoe (Oct. 1, 2014) A new robotic procedure is changing the way we transplant hair. The ARTAS robot leaves no linear scarring and provides more natural results. Video provided by Ivanhoe
Powered by NewsLook.com
Insertable Cardiac Monitor

Insertable Cardiac Monitor

Ivanhoe (Oct. 1, 2014) A heart monitor the size of a paperclip that can save your life. The “Reveal Linq” allows a doctor to monitor patients with A-Fib on a continuous basis for up to 3 years! Video provided by Ivanhoe
Powered by NewsLook.com
Attacking Superbugs

Attacking Superbugs

Ivanhoe (Oct. 1, 2014) Two weapons hospitals can use to attack superbugs. Scientists in Ireland created a new gel resistant to superbugs, and a robot that can disinfect a room in minutes. Video provided by Ivanhoe
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins