The Canadian National Breast Screening Study: a Canadian critique.
The Canadian National Breast Screening Study (CNBSS) was the first study designed to determine the efficacy of screening for breast carcinoma in women 40-49 years old. Women were randomized to undergo either annual mammography and physical examination or usual care after an initial physical examination [1]. Women 50-59 years old were randomized to undergo either annual mammography and physical examination or annual physical examination only [2]. This study, published by epidemiologists on the efficacy of a radiologic examination, therefore, invites evaluation by radiologists.
Department of Radiology, University of British Columbia, Vancouver, Canada.
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D000328:Adult; D001943:Breast Neoplasms / Q000000981:diagnostic imaging / Q000517:prevention & control*; D002170:Canada; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D008327:Mammography; D008403:Mass Screening; D008875:Middle Aged; D011786:Quality Control; D012107:Research Design