American Journal of Roentgenology, Vol 158, 45-49, Copyright © 1992 by American Roentgen Ray Society

ARTICLES

The British Columbia Mammography Screening Program: evaluation of the first 15 months

LJ Burhenne, TG Hislop and HJ Burhenne
Department of Radiology, University of British Columbia, Vancouver, Canada.

We report our experiences in the first 15 months of a government-funded pilot project begun in 1988 to study the feasibility of rapid throughput, low-cost screening mammography in British Columbia. The primary goals of the project were (1) to determine the unit cost of screening mammography within the context of the program; (2) to design and put into operation a centralized system of data collection, analysis, and quality control to enable calculations of cancer detection rates, biopsy rates, biopsy yield ratios, staging, and other specific cancer characteristics; and (3) to study compliance in the community where the program was offered. A total of 11,824 women had mammography at a unit cost of U.S. $32.66. Computerized analysis revealed that (1) 11% of women had known primary risk factors; (2) findings on mammograms were interpreted as abnormal in 9% of screening examinations; (3) breast cancers were confirmed in 47 (22%) of 211 patients who had biopsies, and 87% of these were stage 0-1. The overall cancer detection rate was four per 1000, with five per 1000 for women who had not had mammography in the preceding 2 years and one per 1000 for women who had had mammography in the past 2 years. The results show that screening mammography can be conducted at low cost. Data collection and analysis and compliance were sufficiently convincing to initiate province-wide expansion.
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