Figures

Proportional effects of antiplatelet therapy on (a) non-fatal myocardial infarction (159 trials); (b) non-fatal stroke (158 trials); (c) vascular death (193 trials); and (d) any death (193 trials) in the five main high risk categories of trial. Stratified ratio of odds of an event in treatment groups to that in control groups is plotted for each group of trials (black square) along with its 99% confidence interval (horizontal line). Meta-analysis of results for all trials (and 95% confidence interval) is represented by an open diamond. Adjusted control totals have been calculated after converting any unevenly randomised trials to even ones by counting control groups more than once, but statistical calculations are based on actual numbers from individual trials

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