RESEARCH

Question 1

How do I calculate the risk reduction percentage?

Answer 1

Subtract the risk ratio from 1 and multiply by 100

i.e. risk ratio is .78; 1-.78 = .22 x 100 = 22% reduction of risk

(same as odds ratio)

Question 2

What is a statistically significant p value to show that the effect is not due to chance?

Answer 2

< 0.05