Find the best available evidence: Difference between revisions
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== Levels of evidence<br> == | == Levels of evidence<br> == |
Revision as of 20:14, 24 March 2009
Original Editor - Rachael Lowe. Lead Editors - If you would like to be a lead editor on this page, please contact us. |
Levels of evidence
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This has been adapted from Sackett, Straus and Richardson (2000)[1]
Level of Evidence |
Type of Study |
1a |
Systematic reviews of randomized controlled trials (RCTs) |
1b |
Individual RCTs with narrow confidence interval |
2a |
Systematic reviews of cohort studies |
2b |
Individual cohort studies and low-quality RCTs |
3a |
Systematic reviews of case-control studies |
3b |
Case-controlled studies |
4 | Case series and poor-quality cohort and case-control studies |
5 | Expert opinion |
References[edit | edit source]
- ↑ Sackett DL, Straus SE, Richardson WS, et al. Evidence-Based Medicine: How to Practice and Teach EBM. 2nd ed. Edinburgh, Scotland: Churchill Livingstone Inc; 2000:173-177.
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