Table 6.6 shows the data from the study of Drug B. It should look amazingly familiar: the numbers are the same as in Table 6.4! Nevertheless, the conclusion is exactly the opposite. As you can see, taking Drug B succeeded in lowering the patients’ blood pressure: among the people who took it, twice as many had low blood pressure afterward (forty out of sixty, compared to twenty out of sixty in the control group). In other words, it did exactly what an anti–heart attack drug should do. It moved people from the higher-risk category into the lower-risk category. This factor outweighs everything
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