Table 2

Absolute risk, benefit, odds ratios (OR), and 95% confidence intervals (CI) for cardiovascular events, myocardial infarctions, strokes, and all cause mortality

Absolute risk in control group (%/year) Absolute benefit from aspirin (%/year) OR 95% CI
Cardiovascular events
US4 0.670.110.820.71 to 0.96
UK10 1.34−0.041.020.82 to 1.27
TPT5 1.710.410.740.57 to 0.97
HOT6 1.050.160.850.73 to 0.99
Weighted mean 0.92 0.13 0.85 0.78 to 0.94
Myocardial infarction
US4 0.440.180.560.48 to 0.71
UK10 0.930.030.960.73 to 1.25
TPT5 1.330.310.760.57 to 1.03
HOT6 0.360.130.650.49 to 0.85
Weighted mean 0.52 0.15 0.70 0.62 to 0.79
Strokes
US4 0.18−0.041.220.93 to 1.59
UK10 0.41−0.071.160.80 to 1.68
TPT5 0.320.100.690.38 to 1.26
HOT6 0.420.010.980.78 to 1.24
Weighted mean 0.29 −0.02 1.06 0.91 to 1.24
All cause mortality
US4 0.410.020.960.79 to 1.15
UK10 1.590.160.880.71 to 1.09
TPT5 1.31−0.051.030.78 to 1.36
HOT6 0.860.060.930.79 to 1.09
Weighted mean 0.73 0.05 0.94 0.85 to 1.04