odds

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odds

(odz),
The ratio of probability of occurrence to nonoccurrence of an event.
[pl. of odd, fr. M.E. odde, fr. O.Norse oddi, odd number]

odds

In statistics, the probability that an event may appear or occur. This probability is estimated from known rates of occurrence of the event in a specific setting, e.g., from the known number of patients with a particular disease on a particular island. In practice most patients do not live on islands, and many have diseases whose presentation varies from the norm. The use of odds in health care always implies some degree of probability rather than of proof.

odds

a method of expressing probability, e.g. at odds of 3 to 2 this can be converted to conventional terminology by using each number as the numerator and the sum of them as the denominator, i.e. 3/5, 2/5 or 60% or 40% or 0.6, 0.4. The odds are quoted as for or against. So that at odds of 3 to 2 the chances for an event happening are 3/5. The odds against it happening are 2/5.

posterior odds
probability determined after consideration of the results of a study.
odds ratio
the ratio, used particularly in case-control studies, estimates the chances of a particular event occurring in one population in relation to its rate of occurrence in another population.

Patient discussion about odds

Q. I have weak pelvic muscles.. Ive not had any children or anything like that. And im only 20. Isnt it abit odd It dont help one little bit when you have bladder problems(and struggle to control the flow)

A. Thank you for the answer Lucy, however i forgot to mention i have actually been doing P

More discussions about odds
References in periodicals archive ?
ANDREW LLOYD WEBBER continues his search for a bright new star of musical theatre tonight, and VC's decision to lay odds of 4-1 about Simona to be booted out this evening could be music to punters' ears.
Bookmaking giant William Hill agreed to lay odds against snow falling on the Daily Record's new multi-million building at Central Quay in Glasgow.
Sacrificed on the altar of a shady Madras bookmaker trying to lay odds on a one-day tournament that would otherwise have been forgotten more quickly than amnesia itself.
To lay odds of 1,000 as a single bet requires the layer to stump up a substantial sum to win very little.
I would lay odds the answer would be in terms that even the French and Germans, normally deaf to other languages unless it suits them, would understand.
Although it's not the first time he has beaten her I'd lay odds she'll probably decide that somehow it was her fault and that she wants her husband back.
Hills were one of the few firms still prepared to lay odds on Lazio to win against Hellenic minnows Egaleo in last night's Uefa Cup Group E contest.
In fact, if I were a betting man then I would lay odds on me not being around the team at all tomorrrow.
It's essentially a number-crunching program, that takes an initial supremacy assessment of a given football match, and provides suggested back or lay odds across the whole range of typical markets: 1x2, over/under, correct score, total goals, Asian handicaps, next goal and corners.
Apparently there was a time, long before exchanges, when it was commonplace for individuals to take a view on a sporting event, and then lay odds, to sizeable lumps of cash, that they were right, and you were wrong.
It has been asserted that, if such unfit persons use exchanges to lay odds regularly, the aims of regulation would be defeated.
I wouldn't want to lay odds on this one incurring a loss.