The risk ratio (or relative risk) is the ratio of the risk of an event in the two groups, whereas the odds ratio is the ratio of the odds of an event (see Box 92a) For both measures a value of 1 indicates that the estimated effects are the same for both interventionsHazard ratio The hazard ratio in survival analysis is the effect of an exploratory?13 an odds ratio of 2 means that the event is 2 time more probable given a oneunit increase in the predictor It means the odds would double, which is not the same as the probability doubling In Cox regression, a hazard ratio of 2 means the event will occur twice as often at each time point given a oneunit increase in the predictor Aside a bit of handwaving, yes the rate of occurrence
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