12/11/2023 0 Comments 54 odds meaningThe denominator is the odds in the control or placebo arm = Odds Ratio (OR) The numerator is the odds in the intervention arm So when researchers calculate an odds ratio they do it like this: The scenario for this tutorial is centred around the diagram below, which outlines a fictional parallel two arm randomised controlled trial of a new cholesterol lowering medication against a placebo.Īn odds ratio is a relative measure of effect, which allows the comparison of the intervention group of a study relative to the comparison or placebo group. 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. 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. Contents:īringing it all together – Real world example How long will it take?Ī statistical textbook reworded or how to calculate any of these statistics. How to interpret odds ratios, confidence intervals and p values with a stepwise progressive approach and a’concept check’ question as each new element is introduced. Students of medicine or from the clinical sciences and professions allied to medicine wanting to enhance their understanding of medical literature they will encounter throughout their careers.
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