Navigation Links
New breast cancer risk model quantifies the impact of risk reduction
Date:6/24/2011

How much can a woman lower her risk of breast cancer by losing weight, drinking less, or exercising more? A study published online June 24 in the Journal of the National Cancer Institute describes a new model to estimate the impact of these lifestyle changes on absolute breast cancer risk, suggesting risk reductions that could translate into a substantial number of prevented cancers across an entire population.

Breast cancer risk models are widely used to estimate a woman's chances of developing the disease. These are based on non-modifiable risk factors such as age and family history of breast cancer and on modifiable lifestyle factors. But there is little information on how much lifestyle changes would reduce absolute breast cancer risk in individuals and in the population.

In this study, Elisabetta Petracci, Ph.D., and Mitchell Gail, M.D., Ph.D., at the National Cancer Institute and colleagues developed the model using data from an Italian case-control study with more than 5,000 women. Their model includes five risk factors that are difficult or impossible to modify (reproductive characteristics, education, occupational activity, family history, and biopsy history) and three risk factors that are more modifiable (alcohol consumption, leisure physical activity, and body mass index).

The model predicted that changes in the more modifiable risk factors would reduce the absolute risk of developing breast cancer by quantifiable amounts. The average 20-year reduction in absolute risk among women aged 65 was 1.6% in the entire population; 3.2% among women with a positive family history of breast cancer; and 4.1% among women with the most non-modifiable risk factors.

The authors note that the results may help in designing programs aimed at encouraging lifestyle changes. For instance, in a general population of 1 million women, even a 1.6% absolute risk reduction amounts to 16,000 fewer cases of cancer. In contrast, a 3.2% reduction in a higher-risk group--postmenopausal women with a family history--amounts to only 2,560 fewer cases, according to the model.

The authors conclude that these results give perspective on the potential public health impact of reducing exposure to such risk factors and could be useful for designing studies to test the efficacy of prevention programs.

In an accompanying editorial, Kathy J. Helzlsouer, M.D., of Mercy Medical Center in Baltimore writes that the study "provides extremely important information relevant to counseling women on how much risk reduction they can expect by changing behaviors, and also highlights the basic public health concept that small changes in individual risk can translate into a meaningful reduction in disease in a large population." However, she also points out that these estimates are based on optimistic assumptions of changes in behaviors and that the results do not necessarily apply to people in other countries, such as the U.S., where breast cancer rates among older women are much higher than in Italy.

"These differences, however, serve to emphasize the need for models such as these to be created on the basis of local data to provide the best estimates of risk to aid decision making, whether for the individual or the population in public health settings," she writes.


'/>"/>

Contact: Caroline McNeil
caroline.mcneil@oup.com
301-841-1286
Journal of the National Cancer Institute
Source:Eurekalert

Related medicine news :

1. Paxil Blocks Tamoxifen, Lowers Survival Odds Against Breast Cancer
2. Low forms of cyclin E reduce breast cancer drugs effectiveness
3. Racial disparities persist in the diagnosis of advanced breast cancer and colon cancer in the U.S.
4. For Some Breast Cancer Patients, Shorter Radiation Works Well
5. Short-term radiation therapy successful on breast cancer
6. Few Women at High Risk for Breast Cancer Take Tamoxifen
7. Hormone May Prevent Aggressive Breast Cancer
8. MSU researcher linking breast cancer patients with alternative therapies
9. MRI May Not Add Value to Routine Breast Cancer Care
10. Breast Cancer Stats Differ Racially Despite Similar Mammogram Rates
11. Businesses Rally Big Efforts to Benefit the Susan G. Komen Phoenix Affiliates Fight Against Breast Cancer
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/28/2017)... ... April 28, 2017 , ... Children and adolescents who ... experiences than children in the general population. That’s because foster care is designed ... family challenges. While no fault of their own, youth who have experienced trauma ...
(Date:4/28/2017)... , ... April 28, 2017 , ... ... hERG liability could substantially improve drug safety and minimize the cost of development. ... validating ion channel inhibition using cell lines and for cardiac toxicity using induced ...
(Date:4/28/2017)... ... 28, 2017 , ... Yisrayl Hawkins, Pastor and Overseer at The House of Yahweh in Abilene, ... to and which He does not. Yisrayl says with so many titles and names ... name, but he says with a little Scripture, backed with a lot of research, the ...
(Date:4/28/2017)... ... 28, 2017 , ... Intellitec Solutions announced the publication of ... Microsoft Dynamics GP solution that integrates to their PointClickCare EHR software package. With ... care, Brooke Grove now has the capability to achieve its goal for a ...
(Date:4/28/2017)... ... April 28, 2017 , ... Rob Lowe is a popular actor ... leant his presence to an educational purpose as the host of the “Informed” series. ... cancer. In a recent episode, the series focuses on thyroid cancer. , Although thyroid ...
Breaking Medicine News(10 mins):
(Date:4/20/2017)... DUBLIN , April 20, 2017 ... "Latin America Pharmaceutical Contract Manufacturing Services Market Analysis By Service ... And Segment Forecasts, 2014 - 2025" report to their ... The Latin ... USD 21.0 billion by 2025 Low drug registration ...
(Date:4/19/2017)... , April 19, 2017  IRIDEX Corporation (Nasdaq: ... release financial results for the first quarter 2017 after ... The Company,s management team will host a corresponding conference ... ET. Investors interested in listening to the ... for domestic callers or (703) 326-3030 for international callers, ...
(Date:4/19/2017)... 19, 2017 The Global Effective Microorganisms ... 2022 report has covered and analysed the potential of Global ... market size, shares and growth factors. The report identifies and ... opportunities in the global market. ... Browse 152 Tables and Figures, 6 Major Company Profiles, ...
Breaking Medicine Technology: