Exam 1

Question 1

What’s the difference between incidence and prevalence

Answer 1

Incidence refers to the rate of new cases in the population over a given period of time

Prevalence refers to the proportion of cases (both new and prior) occurring at any given time

Question 2

What is Distribution

Answer 2

Four aspects:

• how many people are affected
• who is getting it
• where are the affected people
• when is the disease most common (and does it change over time)?

Question 3

What is the “burden” of a disease?

Answer 3

How many people are affected. It’s an aspect of “Distribution”

Question 4

What are determinants?

Answer 4

Triad of host-agent-environment

Question 5

What is an Agent?

Answer 5

Can be infectious (bacteria, viruses, etc)
or Noninfectious (toxins, radiation, etc)