Featured Research

from universities, journals, and other organizations

Study questions whether screening really cuts breast cancer deaths

Date:
April 12, 2010
Source:
BMJ-British Medical Journal
Summary:
A study from Denmark finds no effect of the Danish screening program on breast cancer deaths.

A study from Denmark published on the British Medical Journal website on March 23 finds no effect of the Danish screening programme on breast cancer deaths.

Related Articles


Similar results have been seen in other countries, including the UK, leading the authors to question whether screening has delivered the promised effect on breast cancer mortality.

A 2005 study suggested that screening had reduced breast cancer deaths by 25% in Copenhagen. But Karsten Jψrgensen and Peter Gψtzsche from the Nordic Cochrane Centre in Copenhagen, together with Per-Henrik Zahl from Folkehelseinstituttet in Oslo, identified important problems in this study and decided to undertake a more comprehensive analysis of the data.

They compared annual changes in breast cancer deaths in two Danish regions offering publicly organised screening programmes (Copenhagen and Funen county) with non-screened regions across the rest of Denmark.

Their analysis covered 10 years after screening could have had an effect on breast cancer mortality. For comparison, they also looked at the 10-year period before screening was introduced.

Data for each area were divided into three age bands. Women aged 55-74 years, who could benefit from screening, and women aged 35-55 years and 75-84 years, who were largely unaffected by screening.

They found that in women who could benefit from screening (55-74 years) breast cancer mortality declined by 1% per year in the screened areas and by 2% per year in the non-screened areas. In women too young to benefit from screening (35-54 years), breast cancer mortality declined by 5% per year in the screened areas and by 6% per year in the non-screened areas during the same period.

For the older age groups (75-84 years), there was little change over time both in screened and non-screened areas.

"We were unable to find an effect of the Danish screening programme on breast cancer mortality," conclude the authors. "The reductions in breast cancer mortality we observed in screening regions were similar or less than those in non-screened areas and in younger age groups, and are more likely explained by changes in risk factors and improved treatment than by screening mammography."

"Our results are similar to what has been observed in other countries with nationally organised programmes. We believe it is time to question whether screening has delivered the promised effect on breast cancer mortality," they add.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

BMJ-British Medical Journal. "Study questions whether screening really cuts breast cancer deaths." ScienceDaily. ScienceDaily, 12 April 2010. <www.sciencedaily.com/releases/2010/03/100323212152.htm>.
BMJ-British Medical Journal. (2010, April 12). Study questions whether screening really cuts breast cancer deaths. ScienceDaily. Retrieved January 27, 2015 from www.sciencedaily.com/releases/2010/03/100323212152.htm
BMJ-British Medical Journal. "Study questions whether screening really cuts breast cancer deaths." ScienceDaily. www.sciencedaily.com/releases/2010/03/100323212152.htm (accessed January 27, 2015).

Share This


More From ScienceDaily



More Health & Medicine News

Tuesday, January 27, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Shark Bite Victim Making Amazing Recovery

Shark Bite Victim Making Amazing Recovery

AP (Jan. 27, 2015) — A Texas woman who lost more than five pounds of flesh to a shark in the Bahamas earlier this month could be released from a Florida hospital soon. Experts believe she was bitten by a bull shark while snorkeling. (Jan. 27) Video provided by AP
Powered by NewsLook.com
Ebola Mistakes Should Serve a Lesson Says WHO

Ebola Mistakes Should Serve a Lesson Says WHO

AFP (Jan. 25, 2015) — The World Health Organization&apos;s chief on Sunday admitted the UN agency had been caught napping on Ebola, saying it should serve a lesson to avoid similar mistakes in future. Duration: 00:55 Video provided by AFP
Powered by NewsLook.com
Disneyland Measles Outbreak Spreads To 5 States

Disneyland Measles Outbreak Spreads To 5 States

Newsy (Jan. 24, 2015) — Much of the Disneyland measles outbreak is being blamed on the anti-vaccination movement. The CDC encourages just about everyone get immunized. Video provided by Newsy
Powered by NewsLook.com
Growing Measles Outbreak Worries Calif. Parents

Growing Measles Outbreak Worries Calif. Parents

AP (Jan. 23, 2015) — Public health officials are rushing to contain a measles outbreak that has sickened 70 people across 6 states and Mexico. The AP&apos;s Raquel Maria Dillon has more. (Jan. 23) Video provided by AP
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