Percent increase = (Risk Ratio lower bound – 1) x 100 Percent decrease = (1 – Risk Ratio upper bound) x 100 It's worth stating again when comparing two proportions close to 1 or 0, the risk ratio is usually a better summary than the raw difference Odds Ratios We now turn to odds ratios as yet another way to summarize a 2 x 2 tableWhere CI e =cumulative incidence in exposed (index) group and CI u = cumulative incidence in the unexposed (reference) group Odds ratio OR = (odds of disease in exposed) / (odds of disease in unexposed) An odds ratio is a ratio of two odds Relative risk is a ratio of two probabilities The following example shows how to calculate and interpret an odds ratio and relative risk in a reallife situation Example Calculating Odds Ratio an d Relative Risk Suppose 100 basketball players use a new training program and 100 players use an old
Use And Interpret Unadjusted Odds Ratio In Spss
