Statistics Notes: The odds ratio

摘要: In recent years odds ratios have become widely used in medical reports—almost certainly some will appear today's BMJ . There are three reasons for this. Firstly, they provide an estimate (with confidence interval) the relationship between two binary (“yes or no”) variables. Secondly, enable us to examine effects of other variables on that relationship, using logistic regression. Thirdly, a special and very convenient interpretation case-control studies (dealt with future note). The way representing probability, especially familiar betting. For example, single throw die produce six 1 5, 1/5. The is ratio probability event interest occurs it does not. This often estimated by number times …