Incidence

Question 1

Describe incidence

Answer 1

The ratio/rate of new cases that develop during a specified time period in the catchment population

• Defined as the number of NEW cases over a period of time
• Able to calculate incidence by subtracting cumulative incidence rates from two different dates

Question 2

Incidence equation

Answer 2

Incidence = Number of new cases over a period of time / Population at risk over a period of time