11/7/16 The basic difference is that the odds ratio is a ratio of two odds (yep, it's that obvious) whereas the relative risk is a ratio of two probabilities (The/2/18 The primary difference between odds and probability is that while odds is a ratio of occurrence to nonoccurrence, the probability is the ratio of occurrence to the whole Odds are expressed in the ratio, the probability is either written in percentage form or in decimalProbability The odds are often expressed by a ratio;

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