What question did this study set out to answer?

This review assesses the effectiveness and limitations of mammography as a breast cancer screening tool.

Mammography: A Contrary View

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Reviewing evidence on the effectiveness and risks of mammography in breast cancer screening, indicating caution in public health promotion.

This review assesses the effectiveness and limitations of mammography as a breast cancer screening tool.
Reviewed experimental and clinical data on mammography for population screening
Analyzed mortality reduction data and associated risks
Evaluated the emphasis on benefits versus defects in clinical literature
Mammography, combined with history and physical examination, may reduce breast cancer mortality by about one third.
Evidence for mammography's independent role in this mortality reduction is weak and indirect.
Lack of satisfactory investigations on radiation hazards and long-term effects of mammography noted.

John C. Bailar (1976) studied this question.

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Reviewing evidence on the effectiveness and risks of mammography in breast cancer screening, indicating caution in public health promotion.