Measures of Association

Question 1

Absolute Differences

Answer 1

Subtracting frequencies….

Question 2

Relative Differences

Answer 2

Ratio of Frequencies… division of counts

Question 3

Risk Ratio

Answer 3

Risk exposed / Risk non-exposed

A/(A+B) / C/(C=D)

Question 4

Number Needed to Treat (NNT)

Answer 4

1 / Absolute Risk Reduction

Question 5

Odds Ratio

Answer 5

((A/C)/(B/D))

Question 6

Absolute Risk Ratio

Answer 6

(a/(a+b)-b/(b+c))