0217 Basic measures of health of populations

Question 1

Define prevalence

Answer 1

Prevalence = no. people with disease / total population

Question 2

Define cumulative incidence (just incidence)

Answer 2

Incidence = no. of people who develop disease / no. at risk of getting disease in time period

Question 3

Define incidence rate

Answer 3

Incidence rate = no. of people who develop disease / no. of person-time at risk of getting disease

Question 4

What is the relationship of prevalence to incidence rate

Answer 4

Prevalence = incidence rate / average duration of the disease

Question 5

Which statistic is used to estimate the risk of acquiring a disease. It may be measured as a rate or a proportion

Answer 5

Incidence