Odds ratios (OR) are commonly reported in the medical literature as the measure of association between exposure and outcome. However, it is relative risk that people more intuitively understand as a measure of association. Relative risk can be directly determined in a cohort study by calculating a risk ratio (RR). In case-control studies, and in cohort studies in which the outcome occurs in less than 10% of the unexposed population, the OR provides a reasonable approximation of the RR. However, when an outcome is common (iY 10% in the unexposed group), the OR will exaggerate the RR. One method readers can use to estimate the RR from an OR involves using a simple formula. Readers should also look to see that a confidence interval is provided with any report of an OR or RR. A greater understanding of ORs and RRs allows readers to draw more accurate interpretations of research findings.
Description
Odds ratios and risk ratios: what's the difference and why does it matter? - PubMed - NCBI
%0 Journal Article
%1 Viera:2008:South-Med-J:18580722
%A Viera, A J
%D 2008
%J South Med J
%K CategoricalDataAnalysis statistics
%N 7
%P 730-734
%R 10.1097/SMJ.0b013e31817a7ee4
%T Odds ratios and risk ratios: what's the difference and why does it matter?
%U https://www.ncbi.nlm.nih.gov/pubmed/18580722
%V 101
%X Odds ratios (OR) are commonly reported in the medical literature as the measure of association between exposure and outcome. However, it is relative risk that people more intuitively understand as a measure of association. Relative risk can be directly determined in a cohort study by calculating a risk ratio (RR). In case-control studies, and in cohort studies in which the outcome occurs in less than 10% of the unexposed population, the OR provides a reasonable approximation of the RR. However, when an outcome is common (iY 10% in the unexposed group), the OR will exaggerate the RR. One method readers can use to estimate the RR from an OR involves using a simple formula. Readers should also look to see that a confidence interval is provided with any report of an OR or RR. A greater understanding of ORs and RRs allows readers to draw more accurate interpretations of research findings.
@article{Viera:2008:South-Med-J:18580722,
abstract = {Odds ratios (OR) are commonly reported in the medical literature as the measure of association between exposure and outcome. However, it is relative risk that people more intuitively understand as a measure of association. Relative risk can be directly determined in a cohort study by calculating a risk ratio (RR). In case-control studies, and in cohort studies in which the outcome occurs in less than 10% of the unexposed population, the OR provides a reasonable approximation of the RR. However, when an outcome is common (iY 10% in the unexposed group), the OR will exaggerate the RR. One method readers can use to estimate the RR from an OR involves using a simple formula. Readers should also look to see that a confidence interval is provided with any report of an OR or RR. A greater understanding of ORs and RRs allows readers to draw more accurate interpretations of research findings.},
added-at = {2019-11-20T09:48:57.000+0100},
author = {Viera, A J},
biburl = {https://www.bibsonomy.org/bibtex/2de7ddc3a9a11b6c3c1f806bdafdc844e/jkd},
description = {Odds ratios and risk ratios: what's the difference and why does it matter? - PubMed - NCBI},
doi = {10.1097/SMJ.0b013e31817a7ee4},
interhash = {d1577202922ed00e0d287c4759abe8c7},
intrahash = {de7ddc3a9a11b6c3c1f806bdafdc844e},
journal = {South Med J},
keywords = {CategoricalDataAnalysis statistics},
month = jul,
number = 7,
pages = {730-734},
pmid = {18580722},
timestamp = {2019-11-20T09:48:57.000+0100},
title = {Odds ratios and risk ratios: what's the difference and why does it matter?},
url = {https://www.ncbi.nlm.nih.gov/pubmed/18580722},
volume = 101,
year = 2008
}