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:5/27/2016)... , ... May 27, 2016 , ... W.S. Badger ... announced today that it has been recognized as one of the best small businesses ... was named as one of nine small businesses providing progressive benefits to new parents ...
(Date:5/27/2016)... NY (PRWEB) , ... May 27, 2016 , ... ... with Mediaplanet to help educate the many who are unaware of the plight ... to aphasia will run within the “Stroke Awareness” campaign. , The link between ...
(Date:5/27/2016)... ... May 27, 2016 , ... ... in the pharmaceutical, medical and food industries. Aside from its GMP accreditation, Validation ... providing proof of successfully certified products, services and staff. , Validation Center is ...
(Date:5/26/2016)... ... May 26, 2016 , ... Intalere, ... members and suppliers for its inaugural Member Conference at the Paris Hotel in ... elevating the operational health of America’s healthcare providers. , The conference was highlighted ...
(Date:5/26/2016)... ... May 26, 2016 , ... Cardiac arrhythmia ... negative impact on long-term patient survival, reports a team of UPMC researchers in ... week in the Journal of Thoracic and Cardiovascular Surgery, provide critical information that ...
Breaking Medicine News(10 mins):
(Date:5/25/2016)... May 25, 2016 According to ... Type (3D, 2D, 4D), by Therapeutic Area (Oncology, Cosmeceutical/Plastic ... User (Medical Device Manufacturers, Hospitals/ Clinics) - Forecast to ... Medical Animation Market for the forecast period of 2016 ... 301.3 Million by 2021 from USD 117.3 Million in ...
(Date:5/25/2016)... 25, 2016 According to market ... Growth and Demand Forecast to 2022 - Industry Insights ... Others)" published by P&S Market Research, the global insulin ... 2015, and it is expected to grow at a ... insulin pump segment is expected to witness the fastest ...
(Date:5/25/2016)... England , May 25, 2016 ... company employing the precision of circulating tumour DNA ... today announces the appointment of Professor Clive ... provide medical leadership across the clinical development programme, ... Inivata,s products help deliver significant improvements in clinical ...
Breaking Medicine Technology: