R0050/2026-03-31/Q002/SRC06

Research	R0050 — Journalism and Other Truth-Seeking Disciplines
Run	2026-03-31
Query	Q002
Search	S04
Result	S04-R01
Source	SRC06

OCEBM Levels of Evidence (2011)

Source

Field	Value
Title	OCEBM Levels of Evidence
Publisher	Centre for Evidence-Based Medicine, University of Oxford
Author(s)	OCEBM Working Group
Date	2011
URL	https://www.cebm.ox.ac.uk/resources/levels-of-evidence/ocebm-levels-of-evidence
Type	Evidence evaluation framework

Summary

Dimension	Rating
Reliability	High
Relevance	High
Bias: Missing data	Low risk
Bias: Measurement	N/A
Bias: Selective reporting	Low risk
Bias: Randomization	N/A
Bias: Protocol deviation	N/A
Bias: COI/Funding	Low risk

Rationale

Dimension	Rationale
Reliability	Primary framework document from Oxford CEBM
Relevance	Major evidence hierarchy framework in evidence-based medicine
Bias flags	None significant

Evidence Extracts

Evidence ID	Summary
SRC06-E01	OCEBM is essentially a precursor to GRADE's evidence hierarchy