HED 044 Lecture Notes - Lecture 11: Odds Ratio, Free Group, Confidence Interval
2 Nov 2020
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Document Summary
Unexplained variability in the data that cannot be easily explained. Not systematic, is truly occurring at random. Can result because we are just taking a sample of the population. Quantified by including a confidence interval or p value. Occurs when the exposure of interest is related to another factor that is a cause of outcome. Falsely attributing risk due to one factor to another factor. A ratio comparing incidence of disease in exposed group to incidence of disease in unexposed. Rr = incidence of disease in exposed / incidence of disease in unexposed group. Calculate incidence (either ci ir) in exposed group. Calculate incidence (either ci or ir) in unexposed group. A ratio of the odds of exposure among those who are diseased to the odds of exposure among those who are disease-free. Or = odds of exposure in disease / odds of exposure in disease- free group.
