![]() York York Health Economics Consortium 2016. However risk models (that may form the basis of more complex economic models) often built on sets of relative risks associated with different risk factors for outcomes of interest. For relatively rare events relative risks are similar in magnitude to odds ratios, which have statistical properties that favour their use in meta-analyses. ![]() ![]() A relative risk of 1 means that there is no difference in risk between the groups compared, 1) means that the risk is lower (higher) in the treatment group. In clinical trials this corresponds to the probability of developing the outcome of interest in the treatment group compared with (divided by) the equivalent probability in the comparison group. Hazard Ratio > 1: The numerator is greater than the denominator in the hazard ratio. This is calculated as the ratio of the cumulative incidence of the disease in each group. The answer is similar, regardless of whether the effect sizes are risk ratios (RRs), odds ratios (ORs), incidence-rate ratios (IRRs), or hazard ratios (HRs). Relative risk (RR), or risk ratio, is an estimate the magnitude of an association between an exposure and a disease, giving the likelihood of developing the disease on the exposed group compared with the unexposed. KEY WORDS: statistics data interpretation logistic models case-control studies relative risk odds ratio risk ratio risk difference hazard rate.
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