An example of what I am talking about is the choice between risk ratio and odds ratio Odds ratio vs risk ratio You know the difference between risk and odds A risk is the proportion of subjects with an event in a total group of susceptible subjects Thus, we can calculate the risk of having a heart attack among smokers (infarcted smokersEnglishwise, they are correct it is the odds and the odds are based on a ratio calculation It is not, however, the odds ratio that is talked about when results are reported The odds ratio when results are reported refers to the ratio of two odds or, if you prefer, the ratio of two odds ratios That is, let us write o(Xb) = exp(Xb)And for females, the odds of being in the honors class are (32/109)/(77/109) = 32/77 = 42 The ratio of the odds for female to the odds for male is (32/77)/(17/74) = (32*74)/(77*17) = 1809
Odds Ratio Calculation And Interpretation Statistics How To
