Interpretations

Question 1

Relative Scale Measures

Answer 1

Cumulative Incidence Ratio
Incidence Density Ratio

Question 2

CIR

Answer 2

number of new cases/population at risk
The risk of outcome in the exposed group is # times the risk in the unexposed.

Question 3

IDR

Answer 3

number of new cases/person time at risk
The rate of outcome in the exposed group is # times the rate in the unexposed.