Go back to Table 8.7 and recalculate the crude (overall) and stratumspecific odds ratios assuming that the study had (i) half as many people (i.e. divide all the numbers of cases and controls by 2)...

Go back to Table 8.7 and recalculate the crude (overall) and stratumspecific odds ratios assuming that the study had (i) half as many people (i.e. divide all the numbers of cases and controls by 2) and (ii) twice as many people. What effect does changing the size of a study have on the confounding effect of physical activity?

Table 8.7