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Can you convert or to RR?
Yes, if prevalence is low (<10%), as a rule of thumb OR and RR are very similar. However, if prevalence is higher, then OR exaggerates risk/treatment efficacy, so conversion is meaningless.
How is adjusted RR calculated?
RR = OR (1−P0) + (Po × OR) . We can use this formula to correct the adjusted odds ratio obtained from logis- tic regression and derive an estimate of an association or treatment effect that better represents the true relative risk.
What is absolute risk in statistics?
Absolute risk is the size of your own risk. Absolute risk reduction is the number of percentage points your own risk goes down if you do something protective, such as stop drinking alcohol. The size of your absolute risk reduction depends on what your risk is to begin with.
How is the odds ratio converted to a relative risk?
Therefore, the odds ratio is converted to an “average relative risk.” It may be preferable to provide a range of relative risks rather than a single average, because the baseline risk is a measure of risk in the population and could still differ markedly for individual people.
Can you convert adjusted odds ratio to RR?
You can do this calculation for an adjusted OR (I presume from a logistic regression) to a RR, but the end result may not be useful for your goal of meta-analysis. The essential problem is that the adjusted OR e x p ( β 1) from a logistic regression is not an “average” over the population.
What happens when odds ratio is adjusted for covariates?
When an odds ratio is adjusted for covariates (typically by logistic regression), there is no longer a single shared baseline risk. Instead, different values of the covariates in different participants mean that their baseline risk differs, and therefore the relative risk differs too.
How is the odds ratio used in medical research?
The odds ratio is a common measure in medical research of the effect size comparing two groups (treatments or risk factors) in terms of an outcome that is either present or absent. However, the odds ratio is poorly understood. 1 2 3 The relative risk (also called the risk ratio) is more intuitive,…