The odds ratio and the relative risk are relative measures, computed by division In contrast, absolute measures, computed by subtraction rather than division, produce estimates with quite different interpretations (Fahey et al, 1995;When applying it in public health, we can use the odds ratio to see if a certain outcome (eg developing ischemic heart disease) is associated with exposure to a hypothesized risk factor (eg smoking) With an odds ratio, the outcome can be the starting point with which we can determine the relative odds of someone having been exposed to a risk factor Alternatively, we The Relative Risk Ratio and Odds Ratio are both used to measure the medical effect of a treatment or variable to which people are exposed The effect could be beneficial (from a therapy) or harmful (from a hazard) Risk is the number of those having the outcome of interest (death, infection, illness, etc) divided by the total number exposed to the treatment Odds is the
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