Breast cancer deaths not reduced by mammography, says University of Toronto study

Women in their 40s who received annual mammography screening do not have a better chance of surviving breast cancer than those who received usual care from their personal physician, report University of Toronto researchers in the Canadian National Breast Screening Study-1.

"After an average 13-year follow-up, our research shows no mortality benefit from mammography screening in this age group in spite of the fact that mammography diagnosed far more cancers," says Dr. Anthony Miller, a professor emeritus in the Faculty of Medicine's public health sciences department and lead author of the study in the Sept. 3 issue of the Annals of Internal Medicine. "This is the only trial to date specifically designed to evaluate breast screening among women aged 40 to 49."

The study involved 50,000 volunteers in their 40s, recruited from 1980 to 1985, who were not pregnant, had no previous breast cancer diagnosis, and had not had a mammogram in the previous 12 months. Participating at 15 screening centres across Canada, the women were randomly assigned to one of two groups - 25,214 received four or five annual mammography screenings and breast physical examinations and 25,216 women received a single breast physical examination followed by usual care from their personal physician. Both groups were instructed on breast self-examination.

In the study, physicians provided breast physical examinations in three centres in Quebec and nurses in the 12 remaining centres. The physicians and nurses also taught and evaluated breast self-examination while conducting their own examination. Two-view mammography was done on dedicated mammography units.

Cancer detection was higher with mammography than in the group screened by physical examination alone - 87 versus 58 cases at the first screening exam. After 13 years of follow-up, 592 women in the mammogram group were diagnosed with invasive breast cancer compared to 552 in the usual care group. As of 1996, 105 wome

Contact: Janet Wong
University of Toronto

Page: 1 2

Related medicine news :

1. Hausman to give keynote address at Breastfeeding, Motherhood and Feminism symposium
2. Breast implant Website launched by leading plastic surgery societies
3. Breast cancer treatment reduces risk of heart disease
4. Breast reconstruction with implants after mastectomy doesnt hurt survival chances
5. Breast cancer may be uniquely sensitive to inhibitors of PI3K pathway
6. Breast MRI moderately useful for detecting breast cancer, but does not eliminate need for biopsy
7. Breast conserving therapy safe for hereditary breast cancer
8. Breast cancer risk, prognosis and weight gain reduced with physical activity
9. Breast cancer in Asian Americans is rising faster than in any other ethnic group
10. Long Island Breast Cancer Study data: Aspirin helps protect some women against breast cancer
11. Breast cancer in men increasing

Post Your Comments:

(Date:9/1/2020)... ... September 01, 2020 , ... Feeding Matters , ... children with Pediatric Feeding Disorder (PFD), is pleased to announce that the U.S. Centers ... diagnostic code (R code) in the next edition of the U.S. International Classification ...
(Date:8/31/2020)... ... August 31, 2020 , ... The ... to funding innovative lymphoma research and serving the lymphoma community through a comprehensive ... 10th Anniversary of Blood Cancer Awareness Month (BCAM) and its international Light ...
(Date:8/31/2020)... ... 2020 , ... Genesis Chiropractic Software and Billing Network ... of its integrated, HIPAA compliant, telehealth solution, available to US-based clients immediately. With ... seconds. , According to the U.S. Department of Health & Human Services, ...
(Date:8/31/2020)... ... ... for Covid-19 “PTS” with Mediation & Hypnosis , At this very turbulent time in ... deep anxiety, immense stress, and right now are needing serious relief from a constant state ... planet are experiencing a great degree of emotional discomfort, be it fear or worrying about ...
(Date:8/29/2020)... ... ... When professor and author Randy Pausch was diagnosed with pancreatic cancer, he accepted ... melancholic, however, he put together a final lecture in Carnegie Hall in which he ... situation and turned it into something that inspired millions of people worldwide. This inclination ...
Breaking Medicine News(10 mins):
(Date:9/1/2020)... (PRWEB) , ... September 01, 2020 , ... ... laboratory technologies, will host the Agilent Science and Technology Virtual Symposium 2020 ... two-day symposium, Agilent will open a suite of Live webinars and Networking sessions, ...
(Date:9/1/2020)... DENVER (PRWEB) , ... September 01, 2020 , ... ... has been appointed to serve as Secretary to the Board of Trustees ... , Mile High United Way is a Denver-based nonprofit organization that fights ...
(Date:9/1/2020)... , ... September 01, 2020 , ... Breast and ovarian ... Disease Control (CDC), About 3% of breast cancers (about 7,500 women per year) and ... the BRCA1 and BRCA2 genes. Both genes are detectable in the Women’s Excellence ...
Breaking Medicine Technology:
Cached News: