All::Clinical Science::Statistics::Odds and odds ratio

Intro

In statistics, what is meant by odds?

Its a ratio of the number of people who incur a particular outcome to the number of people who do not incur the outcome

In statistics, what is meant by odds ratio?

the ratio of the odds of a particular outcome with experimental treatment and that of control.

Why is Odds ratios useful in case-control studies?

Odds ratio can approximates to relative risk if the outcome of interest is rare.