Odds ratio versus relative risk Since it is a ratio of ratios, the odds ratio is very difficult to interpret However, there are certain commonly occurring situations in which the estimate of the relative risk is not very good and the odds ratio can be used to approximate the relative risk of the event of interest Cases 1 and 4 have the same absolute risk reduction, NNT, and odds ratios, but very different relative risk, relative risk reduction, and risk at baseline Real Example The following example 18 is a prospective study, which compares the incidences of dyskinesia after ropinirole (ROP) or levodopa (LD) in patients with early Parkinson's disease Odds Ratios Versus Relative Risk Odds Ratios Versus Relative Risk Published on by Howard Herrell, MD Many great things have been written about the difference between Odds Ratios (OR) and Relative Risks (RR) Every medical student at some point has been taught the difference
Definition And Calculation Of Odds Ratio Relative Risk Stomp On Step1