Question

Relative risk is the ratio of the _____ of disease in people with the exposure (treatment group) to the _____ of disease in people without exposure (control).

a) incidence, prevalence
b) prevalence, incidence
c) prevalence, frequency
d) incidence, frequency

Answer 1

Relative risk is the ratio of the incidence of disease in exposed group to the incidence of disease in the unexposed group.

Step-by-step explanation:

Relative risk is the ratio of the incidence of disease in people with the exposure (treatment group) to the incidence of disease in people without exposure (control).

For example, let's say we are studying the risk of lung cancer in smokers compared to non-smokers. If the incidence of lung cancer in smokers is 10 cases per 1000 people, and the incidence in non-smokers is 2 cases per 1000 people, the relative risk would be 10/2 = 5. This means that smokers are 5 times more likely to develop lung cancer compared to non-smokers.