Measures of Potential Impact

Question 1

What is risk difference? What does it reflect?

Answer 1

The risk difference is the difference between two estimates of risk. Risk difference reflects and EXCESS RISK attributable to exposure. This is why it is also called attributable risk.

Question 2

What is the null value of risk difference and the null value of risk ratio?

Answer 2

The null value of risk difference = 0

The null value of risk ratio = 1