How does odds ratio compare to probability?

Odds are the probability of an event occurring divided by the probability of the event not occurring. An odds ratio is the odds of the event in one group, for example, those exposed to a drug, divided by the odds in another group not exposed. Odds ratios always exaggerate the true relative risk to some degree.

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2024-02-19 15:39:17

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What is considered a good odds ratio?
For example, an odds ratio of 1.2 is above 1.0, but is not a strong association. An odds ratio of 10 suggests a stronger association.
2024-02-20 07:06:04

Is the odds ratio positive or negative?
Positive odds ratios indicate that the event is more likely to occur, whilst negative odd ratios indicate the event is less likely to occur.
2024-02-19 03:18:38

What is the odds ratio of 1.5 to probability?
You interpret an odds ratio the same way you interpret a risk ratio. An odds ratio of 1.5 means the odds of the outcome in group A happening are one and a half times the odds of the outcome happening in group B.
2024-01-17 16:10:16

Can you have an odds ratio of 0?
As odds of an event are always positive, the odds ratio is always positive and ranges from zero to very large. The relative risk is a ratio of probabilities of the event occurring in all exposed individuals versus the event occurring in all non-exposed individuals.
2023-09-20 20:17:34

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