| odds | The ratio of probability of occurrence to non-occurrence of an event. Origin: pl. Of odd, fr. M.E. Odde, fr. O.Norse oddi, odd number (05 Mar 2000) |
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| odds ratio | <epidemiology> A comparison of the presence of a risk factor for disease in a sample of diseased subjects and non diseased controls. The number of people with disease who were exposed to a risk factor ( I.e. ) over those with disease who were not exposed ( Io ) divided by those without disease who were exposed ( Ne ) over those without who were not exposed ( No ). Thus OR=(I.e./Io)/(Ne/No)= I.e. No / Io Ne. This measure should be used for case control studies where we retrospectively look at risks in those with and without disease. Also known as exposure odds ratio. (05 Dec 1998) |
| exposure odds ratio | <epidemiology> See Odds ratio. (05 Dec 1998) |
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