Incidence rate and relative risks, 95% confidence intervals of events associated with anticoagulant and antiplatelet within different risk strata.

<p>Abbreviations: CI, confidence interval; RR, relative risk.</p><p>*Incidence rate/1000 person-years</p><p>The detailed breakdown by actual therapy shown in <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0125257#pone.0125257.g002" target="_blank">Fig 2</a> shows that compared to warfarin (reference), aspirin was associated with less bleeding. However, bleeding risk was not significantly different for other categories of drug exposures.</p><p>Incidence rate and relative risks, 95% confidence intervals of events associated with anticoagulant and antiplatelet within different risk strata.