The Use of Aspirin for Primary Prevention of Colorectal Cancer: A Systematic Review Prepared for the U.S. Preventive Services Task Force

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Figure. Study selection, inclusion, and exclusion at each screening phase for the efficacy end points.

ASA = aspirin; CRA = colorectal adenoma; CRC = colorectal cancer; RCT = randomized, controlled trial.

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Table 2. Cardiovascular Outcomes with Aspirin Use*

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Table 1. Effects of Regular Use of Aspirin on Colorectal Cancer Incidence and Mortality and on Adenoma Incidence*