S04¶


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

WebSearch — OCEBM levels of evidence and CASP checklists

Summary¶

Field	Value
Source/Database	WebSearch + WebFetch
Query terms	(1) "OCEBM Oxford Centre Evidence-Based Medicine levels of evidence hierarchy 2011" (2) "CASP Critical Appraisal Skills Programme methodology structured evidence evaluation" (3) WebFetch of OCEBM page
Filters	None
Results returned	20 (search) + 1 (fetch)
Results selected	2
Results rejected	19

Selected Results¶

Result	Title	URL	Rationale
S04-R01	OCEBM Levels of Evidence — CEBM Oxford	https://www.cebm.ox.ac.uk/resources/levels-of-evidence/ocebm-levels-of-evidence	Primary OCEBM framework documentation
S04-R02	CASP Checklists	https://casp-uk.net/casp-tools-checklists/	Primary CASP methodology resource

Rejected Results¶

Result	Title	URL	Rationale
S04-R03	Various OCEBM and CASP descriptions	Multiple URLs	Secondary descriptions

Notes¶

OCEBM confirmed as a precursor to GRADE (5-level evidence hierarchy by study type). CASP provides structured checklists for critical appraisal but these are essentially practical implementations of Cochrane/GRADE principles.