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Researchers set benchmarks for screening mammography

OAK BROOK, Ill. -- A recent study of medical audit data funded by the National Cancer Institute (NCI) revealed that community mammography screening results surpass performance recommendations across the United States. Approximately 188 mammography facilities nationwide contributed to the study of more than 1.1 million women, who underwent at least one screening mammography exam between 1996 and 2002. The findings are reported in the October issue of Radiology.

"With a cancer detection rate of 4.8 per 1,000 women, our results show that most radiologists who are reading mammograms are performing well," said Robert D. Rosenberg, M.D., lead researcher and professor of radiology at the University of New Mexico in Albuquerque. "Mammography, combined with better breast cancer treatments, appears to be helping to decrease the number of deaths from breast cancer."

Up until now, there has been no national measurement with which radiologists could compare their individual cancer detection rates.

"There have been no data available for mammographers in the United States to give context to anyone's individual performance results. All prior guidelines were best guesses from a panel of experienced radiologists," Dr. Rosenberg explained.

In the study, data were collected from six NCI-funded research sites, for a total of nearly 2.6 million screening exams assessed by 807 radiologists. Each radiologist's assessment, along with every woman's outcome within 12 months of the initial screening exam, were tallied. The radiologists included in the analysis came from urban, rural, large and small practices of different organizational structures, across broad geographic areas.

Approximately 10 percent of mammograms yielded abnormal findings, for a recall rate of 9.8 percent.

"We found that radiologists are much more likely to err on the side of caution, for a higher recall rate," said co-author Bonnie Yankaskas, Ph.D., professor
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Contact: Heather Babiar
hbabiar@rsna.org
630-590-7762
Radiological Society of North America
26-Sep-2006


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