Risk ratios, odds ratios and the risk difference.

Richardson, Rachel, Kanellopoulou, Afroditi and Dwan, Kerry (2024) 'Risk ratios, odds ratios and the risk difference.'. BMJ Evidence-Based Medicine. (In Press)

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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?

Item Type:	Article
Subjects:	WB Practice of Medicine > WB 102.5 Clinical medicine - evidence-based practice WO Surgery > WO 178 Principles of surgical care
Faculty: Department:	Clinical Sciences & International Health > Clinical Sciences Department
Digital Object Identifer (DOI):	https://doi.org/10.1136/bmjebm-2024-113088
SWORD Depositor:	JISC Pubrouter
Depositing User:	JISC Pubrouter
Date Deposited:	01 Oct 2024 14:06
Last Modified:	01 Oct 2024 14:06
URI:	https://archive.lstmed.ac.uk/id/eprint/25159

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