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. 2017 Jun 21;18(6):331–335. doi: 10.1002/jgf2.102

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© 2017 The Authors. Journal of General and Family Medicine published by John Wiley & Sons Australia, Ltd on behalf of Japan Primary Care Association.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Benefits and risks of low‐dose aspirin in primary prevention trials. The numbers of vascular events avoided and episodes of major bleeding caused by per 1000 patients treated with aspirin per year re plotted from the results of individual placebo‐controlled trials of aspirin in different patient populations characterized by various degrees of cardiovascular risk. WHS denotes Women's Health Study, PHS Physicians’ Health Study, PPP Primary Prevention Project, HOT Hypertension Optimal Treatment Study, BDT British Doctors Trial, TPT Thrombosis Prevention Trial, and SAPAT Swedish Angina Pectoris Aspirin Trial (quoted from reference 18)