What is an odds ratio and how is it used?
An example of an AI chatbot conversation about understanding odds ratios in statistics.
What is an odds ratio and how is it used?
An odds ratio is a statistic that quantifies the odds of an event occurring in one group compared to another. It's commonly used in epidemiology and clinical research.
Can you give me an example of how to calculate it?
Sure! If you have a study with 30 smokers and 10 develop lung cancer, while 70 non-smokers have 5 cases, the odds ratio would be (10/20) / (5/65) = 6.5.
What does an odds ratio of 6.5 indicate?
An odds ratio of 6.5 suggests that smokers are 6.5 times more likely to develop lung cancer compared to non-smokers.
Are there any limitations to using odds ratios?
Yes, odds ratios can be misleading if the event is common, as they may exaggerate the strength of the association.
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