Annals of internal medicine
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Meta Analysis
Breast cancer screening: a summary of the evidence for the U.S. Preventive Services Task Force.
To synthesize new data on breast cancer screening for the U.S. Preventive Services Task Force. ⋯ In the randomized, controlled trials, mammography reduced breast cancer mortality rates among women 40 to 74 years of age. Greater absolute risk reduction was seen among older women. Because these results incorporate several rounds of screening, the actual number of mammograms needed to prevent one death from breast cancer is higher. In addition, each screening has associated risks and costs.