the odds of suffering one or more of four categories of event -- namely , non-fatal myocardial infarction , non-fatal major stroke , vascular death , or non-vascular death -- were 18 % less in the two groups allocated to receive aspirin than in the group allocated to receive placebo ( 2p = 0.01 ) .
C0027051
myocardial infarction
C0004057
aspirin