Navigation Links
Recent use of some birth control pills may increase breast cancer risk
Date:7/31/2014

PHILADELPHIA Women who recently used birth control pills containing high-dose estrogen and a few other formulations had an increased risk for breast cancer, whereas women using some other formulations did not, according to data published in Cancer Research, a journal of the American Association for Cancer Research.

"Our results suggest that use of contemporary oral contraceptives [birth control pills] in the past year is associated with an increased breast cancer risk relative to never or former oral contraceptive use, and that this risk may vary by oral contraceptive formulation," said Elisabeth F. Beaber, PhD, MPH, a staff scientist in the Public Health Sciences Division of Fred Hutchinson Cancer Research Center in Seattle, Washington.

"Our results require confirmation and should be interpreted cautiously," added Beaber. "Breast cancer is rare among young women and there are numerous established health benefits associated with oral contraceptive use that must be considered. In addition, prior studies suggest that the increased risk associated with recent oral contraceptive use declines after stopping oral contraceptives."

In a nested case-control study of 1,102 women diagnosed with breast cancer and 21,952 controls, Beaber and colleagues found that recent oral contraceptive use increased breast cancer risk by 50 percent, compared with never or former use. All study participants were at Group Health Cooperative in the Seattle-Puget Sound area. Patients received a cancer diagnosis between 1990 and 2009.

Birth control pills containing high-dose estrogen increased breast cancer risk 2.7-fold, and those containing moderate-dose estrogen increased the risk 1.6-fold. Pills containing ethynodiol diacetate increased the risk 2.6-fold, and triphasic combination pills containing an average of 0.75 milligrams of norethindrone increased the risk 3.1-fold.

Birth control pills containing low-dose estrogen did not increase breast cancer risk.

About 24 percent, 78 percent, and less than 1 percent of study controls who were recent oral contraceptive users filled at least one prescription in the past year for low-, moderate-, and/or high-estrogen dose oral contraceptives, respectively, according to Beaber.

Unlike most previous studies that depended on women's self-report or recall, which may cause bias, Beaber and colleagues used electronic pharmacy records to gather detailed information on oral contraceptive use including drug name, dosage, and duration of medication.


'/>"/>

Contact: Jeremy Moore
jeremy.moore@aacr.org
215-446-7109
American Association for Cancer Research
Source:Eurekalert

Related medicine news :

1. The Rothenberg Law Firm LLP has Recently Taken Steps to Grow its New York Office
2. Recent Research Finds a New Driver of Cost Variation in Episode Payments
3. Affordable Flower Girl Dresses Recently Unveiled at Agebc.com
4. Cheap Satin Bridal Gowns Recently Provided By Well-known Supplier iFitDress.com
5. What’s The Point of Insulation? Clean Crawls Explains The Dangers of Heat Transfer in Recently Released Article
6. Allergy Sufferers are Urged to Seek Medical Help in Recent Article by Western Washington Medical Group
7. Common Dental Care Questions Answered by Community Health Center of Snohomish County in Recent Article
8. LawyersandSettlements.com Interviews Veterans Benefits Attorney Shanin Specter about Recent VA Hospital Reports
9. No increased risk of cancer near Sellafield or Dounreay in recent years
10. Cheap Maple Caskets Recently Added To China Casket Manufacturer MillionaireCasket.com’s Product Line
11. Testosterone Lawsuit News: Bernstein Liebhard LLP Notes Recent Study Finding Dramatic Rise in Canadian Men Taking Hormone Therapy Treatments
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/12/2017)... ... , ... HMP , a leader in healthcare events and education, today announced ... Award for ‘Best B-to-B Healthcare Website.’ Winners were announced during the Eddie & Ozzie ... competition recognizes editorial and design excellence across a range of sectors. This year’s program ...
(Date:10/12/2017)... ... October 12, 2017 , ... On Saturday, October 21, the Health ... Miles by Moonlight to raise money for the American Heart Association Heart Walk. Teams ... Teams will work together to keep their treadmills moving for 5 hours. Treadmills will ...
(Date:10/12/2017)... ... October 12, 2017 , ... Health ... interactive health literacy software tool, and the Cancer Patient Education Network (CPEN), an ... education, today announce a new strategic alliance. , As CPEN’s strategic partner, ...
(Date:10/12/2017)... Miramar, FL (PRWEB) , ... October 12, 2017 ... ... is presenting the latest in wound care advancements to physician colleagues, skilled nursing ... lecture is titled, "Navigating the Treacherous Waters of Wound Care." , "At many ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... its enhanced Pepper Flow promotional review platform at the Promotional Review Committee ... insight-driven capabilities help marketers streamline the medical, legal, and regulatory review (MLR) ...
Breaking Medicine News(10 mins):
(Date:9/23/2017)... HORSHAM, Pa. , Sept. 22, 2017 ... received a complete response letter from the U.S. Food ... (BLA) seeking approval of sirukumab for the treatment of ... response letter indicates additional clinical data are needed to ... of moderately to severely active RA. ...
(Date:9/22/2017)... SAN DIEGO , Sept. 22, 2017 ... ll medical device is now successfully helping those with ... Union. Fibromyalgia diagnosed Amanda in ... getting dressed and washing my hair, experiencing no sleep ... body in painful spasm… I cannot recommend [the AVACEN ...
(Date:9/19/2017)... ZirMed Inc ., a recognized leader in cloud-based revenue cycle ... ranked #1 by its users for the seventh consecutive year ... ZirMed was recognized as the top-ranked end-to-end revenue cycle management ... 200 beds and holds one of the longest #1 ranking ... ...
Breaking Medicine Technology: