|Outcomes at mean 10 years||Aspirin||Placebo||RRR (95% CI)||NNT (CI)|
|*Abbreviations defined in glossary; RRR, RRI, NNT, NNH, and CI calculated from data in article.|
|†Major cardiovascular event = non-fatal myocardial infarction, non-fatal stroke, or death from cardiovascular causes.|
|Major cardiovascular event†||2.4%||2.6%||9% (−3 to 20)||Not significant|
|Stroke||1.1%||1.3%||17% (1 to 31)||445 (227 to 10377)|
|Death from cardiovascular causes||0.60%||0.63%||5% (−22 to 26)||Not significant|
|Transient ischemic attack||0.93%||1.2%||22% (6 to 36)||385 (216 to 1687)|
|Fatal or non-fatal myocardial infarction||0.99%||0.97%||2% (−16 to 25)||Not significant|
|Gastrointestinal bleeding requiring transfusion||0.6%||0.5%||40% (7 to 83)||554 (305 to 2751)|
Low dose aspirin lowered stroke risk but not risk of myocardial infarction or cardiovascular death in women
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