302 Calibrating cases

Question 1

What is a case definition?

Answer 1

Criteria for the determination of whether someone has disease

Question 2

What is a case identification?

Answer 2

The operationalisation of the case definition
- How we identify who is a case

Question 3

What are predictive values?

Answer 3

Positive Predictive Value (PPV) = likelihood patient with positive test result actually has the disease

Negative Predictive Value (NPV) = likelihood patient with negative test result does not have the disease

Question 4

What is a case-control study?

Answer 4

Groups who differ at outset on disease (condition/outcome) status

Useful for low prevalence conditions