HLSC 2P27 Lecture Notes - Lecture 5: Odds Ratio, Relative Risk, Red Meat
6 Feb 2018
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Document Summary
Answers the question: how strongly are exposure and outcome related - how strong is the association. Compare those counts in the exposed and unexposed, and depending on the study design, we will get a risk of the outcome or be able to say what the odds are that the outcome was due to the exposure. Incidence of outcome in exposed vs. not exposed gives us relative risk. Calculated the odds that the outcome is from that exposure. Odds ratio: ratio of odds of suffering some fate (in exposed vs. unexposed) Relative risk: percentage difference in classification between two groups (those who develop disease/outcome vs. those who do not - based on incidence of outcome in exposed/unexposed groups) Likelihood of an outcome developing between two groups at multiple points in time. Similar to rr, but not the same: 70/1000, 200/1000. Those who did not eat fish, but still got gi illness accounts for chance.
