The Canadian National Breast Screening Study-1: Breast Cancer Mortality after 11 to 16 Years of Follow-up: A Randomized Screening Trial of Mammography in Women Age 40 to 49 Years

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   Figure 1. There was no defined list of potential participants from which the numbers not randomly assigned can be determined. Random assignment and follow-up of volunteers who signed the informed consent form in the Canadian National Breast Screening Study-1.
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   Figure 2. Cumulative numbers of invasive breast cancers and deaths in the mammography and usual care groups according to year from study entry.

• Copyright ©2004 by the American College of Physicians