Lecture 4/5: Incidence and Prevalence

Question 1

What are the two measures of disease occurrence?

Answer 1

The two measures of disease occurrence are incidence and prevalence.

Question 2

How is incidence calculated?

Answer 2

Incidence is calculated by counting the number of disease events that occur over a period of time (T), using the formula: EGO = a ÷ EG (/ T) and CGO = b ÷ CG (/ T).

Question 3

What is the key characteristic of prevalence measurement?

Answer 3

Prevalence involves counting the number of people with disease at one point in time (T), where T=1, and does not include time in its calculation.