# Case Control Study Odds Ratio Interpretation In a case-control study, we calculate the exposure odds ratio.

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A total of 240 cases and 134 controls were identified.

Or those in a traffic accident were 62% more likely to have been texting while driving.

Then those who were not in a traffic accident in the past year.

The first steps in learning to understand and appreciate evidence-based medicine are daunting to say the least, especially when confronted with the myriad of statistics in any paper.

This short tutorial aims to introduce healthcare students to the interpretation of some of the most commonly used statistics for reporting the results of medical research.

## Comments Case Control Study Odds Ratio Interpretation

• ###### Explaining Odds Ratios - nih.gov

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. Odds ratios are most commonly used in case-control studies, however they can also be used in cross-sectional and cohort study designs as well with some modifications and/or assumptions.…

• ###### On the use, misuse and interpretation of odds ratios. The BMJ

On the use, misuse and interpretation of odds ratios. Therefore, the ratio of the odds of exposure among cases to the odds of exposure among non-cases is calculated. In theory, all case-control studies can be viewed as nested case-control studies, in which both cases and controls are drawn from a well defined source population.…

• ###### Case-Control Studies Odds Ratios - sjsu.edu

Pairs in which the control but not the case reported low fruit/veggie consumption.3 Based on this information, the odds ratio estimate 24 45 = = v u ˆOR = 1.88, indicating that low fruit/veggie “exposure” was associated with an 88% increase in risk. The 95% confidence interval for the odd ratio parameter is calculated. The lnOR^ = 0.6286 and 24 1 45…

• ###### How does one correctly interpret odds ratio from case-control studies?

All Answers 28 If the sampling fraction for both cases and controls is known then you will be able to calculate the risk ratio. If your case-control study is nested within a well defined cohort, the odds ratio will be a good approximation of the risk ratio if the sampling is done using the case-base method.…

• ###### Measuring Association in Case-Control Studies

Incidence is Unknown in a Case-Control Study. In a cohort type study, one can calculate the incidence in each group, the risk ratio, the risk difference, and the attributable fraction. In addition, one can also calculate an odds ratio in a cohort study, as we did in the two examples immediately above.…

• ###### Odds Ratio - Measures of Association Coursera

The odds ratio is the ratio of the odds of the health outcome or disease in the exposed Relative to the odds of the disease or health outcome in the none exposed or less exposed group. Odds ratios can be calculated in cohorts studies and in case control studies.…