Dissolve-E: AWMF Guideline Registry
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CodeSystem: OCEBM 2009 Levels of Evidence

Official URL: http://fhir.awmf.org/awmf.ig/CodeSystem/cs-ocebm-2009-levels-of-evidence Version: 0.2.0
Active as of 2026-01-29 Computable Name: OCEBM2009LevelsOfEvidence

CodeSystem representing the Oxford Centre for Evidence-Based Medicine 2009 CEBM Levels of Evidence

This Code system is referenced in the content logical definition of the following value sets:

This case-insensitive code system http://fhir.awmf.org/awmf.ig/CodeSystem/cs-ocebm-2009-levels-of-evidence defines the following codes:

CodeDefinitionDeutsch (German, de)
1a Systematic reviews of high-quality RCTs 1a
1b Individual RCT (with narrow confidence interval) 1b
1c All or none RCTs 1c
2a Systematic reviews of cohort studies 2a
2b Individual cohort study or low-quality RCT 2b
2c Outcomes research; ecological studies 2c
3a Systematic reviews of case-control studies 3a
3b Individual case-control study 3b
4 Case series 4
5 Expert opinion 5