Lecture 6

Question 1

Relative risk

Answer 1

the ratio of the risk of the outcome in the exposed group to the risk of the outcome in the unexposed group
provides an estimate of the increased or decreased risk of an outcome due to a particular exposure

Question 2

Odds ratio

Answer 2

used in place of the RR in case control and cross sectional studies

Question 3

9 criteria that determine if there’s a causal association

Answer 3

• temporality (exposure occurred before disease)
• strength of the association
• consistency
• specificity
• dose response relationship
• biological plausibility
• coherence (association doesn’t conflict with known facts about the history and biology of disease)
• experiment
• analogy