Question

When public health officials are interested in determining the number of cases which could possibly be prevented by eliminating a risk factor, which measure of association would they be interested in?

a. Risk ratio

b. Odds ratio

c. Risk difference

d. Prevalence

e. Incidence in the exposed group

Answer 1

Risk difference is a better measure to provide data to health officials for determining the number of cases that could be eliminated by removing a certain risk factor.

Since risk difference gives the absolute difference between the cumulative differences between the exposed and unexposed specimens to the particular risk.

It is more than a ratio like the risk ratio or the odds ratio and prevalence( commonness ) is not a statistical measure.

Incidence in the exposed group cannot be measured as data for incidence for unexposed group( the other half of the data) is not mentioned.