Case-Control Studies

Question 1

What is a case-control study?

Answer 1

Participants are selected based on their disease status

Question 2

How is time (generally) measured in case control studies?

Answer 2

Participants (both cases and controls) are retrospectively measured for E within a defined time period

Question 3

What are the two study bases for case-control studies?

Answer 3

Primary Study Base - Potential study subjects from a well-defined source population (e.g. residents in a city)
Secondary Study Base - A population one step removed from the actual source population (e.g. a disease registry)