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

Established in 1927 by the American College of Physicians

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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. Random assignment and follow-up of volunteers who signed the informed consent form in the Canadian National Breast Screening Study-1. There was no defined list of potential participants from which the numbers not randomly assigned can be determined.

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Table 1. Causes of Death through the End of 1993

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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.

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Table 2. Cumulative Number of Deaths from Breast Cancer through 30 June 1996, according to Allocation and Time of Breast Cancer Detection

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Table 3. Summary of Results from Cox Proportional Hazards Regression Model

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Table 4. Distribution of Participants by Single Year of Age

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Appendix Table 1. Baseline Characteristics of Participants Who Did and Did Not Report a Self-Detected Breast Lump at Screen 1

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Appendix Table 2. Cases of Cancer according to Year, Size of Invasive Breast Tumors, and Mode of Detection

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Appendix Table 3. Cross-Classification of Size of Screening-Detected Invasive Breast Cancer with Nodal Status

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Appendix Table 4. Nodal Status of Invasive Breast Cancer Ascertained in Women Who Reported a Lump at the Initial Physical Examination