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1. www.ncbi.nlm.nih.gov › books › NBK431098Odds Ratio - StatPearls - NCBI Bookshelf

   www.ncbi.nlm.nih.gov › books › NBK431098

   May 22, 2023 · The odds ratio is a ratio of two sets of odds: the odds of the event occurring in an exposed group versus the odds of the event occurring in a non-exposed group. Odds ratios commonly are used to report case-control studies.

   • Author: Steven Tenny, Mary R. Hoffman
   • Published: 2023/05/22

   • Affiliations: University of Nebraska Medical Center

2. bpb-us-w2.wpmucdn.com › Explaining-Odds-RatiosExplaining Odds Ratios

   bpb-us-w2.wpmucdn.com › Explaining-Odds-Ratios

   What is an odds ratio? An odds ratio (OR) is a measure of association between an exposure and an outcome. The OR represents the odds that an outcome will occur given a particular exposure, compared to the odds of the outcome occurring in the absence of that expo-sure. Odds ratios are most commonly used in case-control stud-

3. europepmc.org › article › MEDExplaining odds ratios. - Abstract - Europe PMC

   europepmc.org › article › MED

   • Cached

   Aug 1, 2010 · What is an odds ratio? An odds ratio (OR) is a measure of association between an exposure and an outcome. The OR represents the odds that an outcome will occur given a particular exposure, compared to the odds of the outcome occurring in the absence of that exposure.

   • Author: Magdalena Szumilas

   • Publish Year: 2010

4. sites.pitt.edu › ~bertsch › riskUnderstanding Relative Risk, Odds Ratio, and Related Terms:

   sites.pitt.edu › ~bertsch › risk

   in a control group. The odds ratio (OR) is the odds of an event in an experimental group relative to that in a control group. An RR or OR of 1.00 indicates that the risk is comparable in the two groups. A value greater than 1.00 indicates increased risk; a value lower than 1.00 indicates decreased risk. The 95% confidence intervals and statistical

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   • Page Count: 5

5. www.semanticscholar.org › paper › Explaining-odds[PDF] Explaining odds ratios. | Semantic Scholar

   www.semanticscholar.org › paper › Explaining-odds

   Aug 1, 2010 · This article breaks down the odds ratio by reviewing the concepts and calculations of probability and odds, and discusses how to interpret an odds ratio, and how these ratios can be useful in real-world applications.

6. onlinelibrary.wiley.com › doi › pdfAnalysis of Categorical Data: The Odds Ratio as a Measure of ...

   onlinelibrary.wiley.com › doi › pdf

   Apr 14, 2011 · Summary. This chapter contains an overview of statistical methods for categorical data in general and binary outcomes in particular, with an emphasis on the odds ratio and its applications in psychiatry.

7. People also ask

   What is an odds ratio?

   • An odds ratio (OR) is a measure of association between an exposure and an outcome. The OR represents the odds that an outcome will occur given a particular exposure, compared to the odds of the outcome occurring in the absence of that expo-sure.

   Explaining Odds Ratios

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   What does it mean if odds ratio is less than 1?

   • This can be seen from the interpretation of the odds ratio. An odds ratio greater than 1 implies there are greater odds of the event happening in the exposed versus the non-exposed group. An odds ratio of less than 1 implies the odds of the event happening in the exposed group are less than in the non-exposed group.

   Odds Ratio - StatPearls - NCBI Bookshelf - National Center for

   www.ncbi.nlm.nih.gov/books/NBK431098/

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   Is the odds ratio statistically significant?

   • If the confidence interval for the odds ratio includes the number 1 then the calculated odds ratio would not be considered statistically significant. This can be seen from the interpretation of the odds ratio. An odds ratio greater than 1 implies there are greater odds of the event happening in the exposed versus the non-exposed group.

   Odds Ratio - StatPearls - NCBI Bookshelf - National Center for

   www.ncbi.nlm.nih.gov/books/NBK431098/

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   What is the odds ratio in a 2-by-2 table?

   • In a 2-by-2 table with cells a, b, c, and d (see figure), the odds ratio is odds of the event in the exposure group (a/b) divided by the odds of the event in the control or non-exposure group (c/d). Thus the odds ratio is (a/b) / (c/d) which simplifies to ad/bc. This is compared to the relative risk which is (a / (a+b)) / (c / (c+d)).

   Odds Ratio - StatPearls - NCBI Bookshelf - National Center for

   www.ncbi.nlm.nih.gov/books/NBK431098/

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   How do you calculate odds ratio?

   • Odds Ratio = (odds of the event in the exposed group) / (odds of the event in the non-exposed group) If the data is set up in a 2 x 2 table as shown in the figure then the odds ratio is (a/b) / (c/d) = ad/bc. The following is an example to demonstrate calculating the odds ratio (OR). Example 1

   Odds Ratio - StatPearls - NCBI Bookshelf - National Center for

   www.ncbi.nlm.nih.gov/books/NBK431098/

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   What is odds ratio & relative risk?

   • The odds ratio can be confused with relative risk. As stated above, the odds ratio is a ratio of 2 odds. As odds of an event are always positive, the odds ratio is always positive and ranges from zero to very large.

   Odds Ratio - StatPearls - NCBI Bookshelf - National Center for

   www.ncbi.nlm.nih.gov/books/NBK431098/

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8. pubmed.ncbi.nlm.nih.gov › 20842279Explaining odds ratios - PubMed

   pubmed.ncbi.nlm.nih.gov › 20842279

   Explaining odds ratios. J Can Acad Child Adolesc Psychiatry. 2010 Aug;19 (3):227-9. Author. Magdalena Szumilas 1. Affiliation. 1 Research Associate, Sun Life Financial Chair in Adolescent Mental Health, IWK Health Centre & Dalhousie University, Maritime Outpatient Psychiatry, Halifax, Nova Scotia. PMID: 20842279. PMCID: PMC2938757.