Changes in the guidelines for breast cancer screening have resulted in increased use of mammography. However, some women screened by mammography may have a false positive result, requiring further tests, including biopsy, resulting in anxiety, inconveniences and trauma for the patient as well as increased costs, according to background information in the article. Further, the authors suggest, the advent of less invasive breast biopsy techniques might also contribute to an increase in the use of biopsy, but there is little information on the actual frequency of biopsy in the general community.
Karthik Ghosh, M.D., M.S., of the Mayo Clinic, Rochester, Minn., and colleagues, reviewed the medical records of women 18 years and older from January 1, 1988 through December 31, 1999, using the resources of the Rochester Epidemiology Project which indexes all inpatient and outpatient medical care provided to residents of Olmsted County, Minn. The rate of utilization of biopsy was calculated as the number of biopsies performed (except when multiple biopsies were performed on the same breast at one time) compared with the number of women in Olmsted County.
The researchers identified 2,878 biopsies performed on 2,521 women residing in Olmsted County during the study period. "The overall, age-adjusted, annual utilization rate of breast biopsies was 62.6 percent per 10,000 women and remained fairly constant throughout the study period," the authors write. "There was no significant change in the trends in breast biopsy utilization before or after the introduction of the core-needle breast biopsy procedure in 1992. Utilization rates for women a
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