Risk ratios, odds ratios and the risk difference.

Rachel Richardson; Afroditi Kanellopoulou; Kerry Dwan

doi:10.1136/bmjebm-2024-113088

Risk ratios, odds ratios and the risk difference.

Rachel Richardson, Afroditi Kanellopoulou, Kerry Dwan

Clinical Sciences

Cochrane

Research output: Contribution to journal › Article › peer-review

1 Citation (Scopus)

Abstract

Scenario

As a heart surgeon, you regularly perform aortic valve replacement, using a median sternotomy technique. However, you are aware that less-invasive options are available, and you wonder whether these may be as effective and safe as your current practice. After searching the Cochrane Library, you find a systematic review, ‘Limited versus full sternotomy for aortic valve replacement1’. The authors of the review conclude that ‘upper hemi‐sternotomy may have little to no effect on mortality versus full median sternotomy (risk ratio (RR) 0.93, 95% CI 0.45 to 1.94)’. What does this statistic mean in practice?

Original language	English
Pages (from-to)	66-67
Number of pages	2
Journal	BMJ Evidence-Based Medicine
Volume	30
Issue number	1
DOIs	https://doi.org/10.1136/bmjebm-2024-113088
Publication status	Published - 31 Jul 2024

Keywords

Evidence-Based Practice

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10.1136/bmjebm-2024-113088

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title = "Risk ratios, odds ratios and the risk difference.",

abstract = "ScenarioAs a heart surgeon, you regularly perform aortic valve replacement, using a median sternotomy technique. However, you are aware that less-invasive options are available, and you wonder whether these may be as effective and safe as your current practice. After searching the Cochrane Library, you find a systematic review, {\textquoteleft}Limited versus full sternotomy for aortic valve replacement1{\textquoteright}. The authors of the review conclude that {\textquoteleft}upper hemi‐sternotomy may have little to no effect on mortality versus full median sternotomy (risk ratio (RR) 0.93, 95\% CI 0.45 to 1.94){\textquoteright}. What does this statistic mean in practice?",

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Risk ratios, odds ratios and the risk difference.

Abstract

Keywords

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